{"id":9266,"date":"2023-02-24T20:05:56","date_gmt":"2023-02-24T12:05:56","guid":{"rendered":"https:\/\/blog.iyatt.com\/?p=9266"},"modified":"2025-08-22T10:01:47","modified_gmt":"2025-08-22T02:01:47","slug":"%e8%ae%a1%e7%ae%97%e6%9c%ba%e4%ba%8c%e7%ba%a7-c-%e8%af%ad%e8%a8%80%e6%83%85%e6%99%af%e7%90%86%e8%a7%a3","status":"publish","type":"post","link":"https:\/\/blog.iyatt.com\/?p=9266","title":{"rendered":"\u8ba1\u7b97\u673a\u4e8c\u7ea7 C \u8bed\u8a00\u8003\u8bd5\u51c6\u5907\u8bb0\u5f55"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#1_%E5%8F%91%E5%8F%91%E6%81%BC%E9%AA%9A\" >1 \u53d1\u53d1\u607c\u9a9a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#2_%E7%8E%AF%E5%A2%83\" >2 \u73af\u5883<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3_%E6%83%85%E6%99%AF\" >3 \u60c5\u666f<\/a><ul class='ez-toc-list-level-2' ><li class='ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#31_VC2010_%E8%BF%90%E8%A1%8C%E4%B8%80%E9%97%AA%E8%80%8C%E8%BF%87\" >3.1 VC++2010 \u8fd0\u884c\u4e00\u95ea\u800c\u8fc7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#32_%E5%85%A5%E5%8F%A3%E5%87%BD%E6%95%B0_main\" >3.2 \u5165\u53e3\u51fd\u6570 main<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#33_gets\" >3.3 gets<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#331_%E5%8F%98%E9%87%8F%E5%AE%9A%E4%B9%89%E4%BD%8D%E7%BD%AE\" >3.3.1 \u53d8\u91cf\u5b9a\u4e49\u4f4d\u7f6e<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#34_%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E5%A4%A7%E5%B0%8F\" >3.4 \u6570\u636e\u7c7b\u578b\u5927\u5c0f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#35_if\" >3.5 if<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#351_%E6%8E%A7%E5%88%B6%E8%8C%83%E5%9B%B4\" >3.5.1 \u63a7\u5236\u8303\u56f4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#352_else_%E5%8C%B9%E9%85%8D\" >3.5.2 else \u5339\u914d<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#36_switch\" >3.6 switch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#37_%E8%87%AA%E5%A2%9E%E8%87%AA%E5%87%8F\" >3.7 \u81ea\u589e\u81ea\u51cf<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#38_%E5%92%8C_%E4%BC%98%E5%85%88%E7%BA%A7\" >3.8 = \u548c , \u4f18\u5148\u7ea7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#39_%E9%80%97%E5%8F%B7%E8%BF%90%E7%AE%97%E7%AC%A6%E9%A1%BA%E5%BA%8F\" >3.9 \u9017\u53f7\u8fd0\u7b97\u7b26\u987a\u5e8f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#310_%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97\" >3.10 \u903b\u8f91\u8fd0\u7b97<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3101_%E6%8C%89%E4%BD%8D%E4%B8%8E\" >3.10.1 \u6309\u4f4d\u4e0e &amp;<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3102_%E6%8C%89%E4%BD%8D%E6%88%96\" >3.10.2 \u6309\u4f4d\u6216 |<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3103_%E6%8C%89%E4%BD%8D%E5%BC%82%E6%88%96\" >3.10.3 \u6309\u4f4d\u5f02\u6216 ^<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3104_%E5%8F%96%E5%8F%8D%E8%BF%90%E7%AE%97%E7%AC%A6\" >3.10.4 \u53d6\u53cd\u8fd0\u7b97\u7b26 ~<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3105_%E5%B7%A6%E7%A7%BB%E8%BF%90%E7%AE%97%E7%AC%A6_%3E\" >3.10.5 \u5de6\u79fb\u8fd0\u7b97\u7b26 &lt;&lt; \u548c \u53f3\u79fb\u8fd0\u7b97\u7b26 &gt;&gt;<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#311_%E6%95%B4%E6%95%B0%E6%95%B0%E7%BB%84%E5%88%9D%E5%A7%8B%E5%8C%96\" >3.11 \u6574\u6570\u6570\u7ec4\u521d\u59cb\u5316<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#312_%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%8C%87%E9%92%88%E5%92%8C%E5%AD%97%E7%AC%A6%E6%95%B0%E7%BB%84%E7%9A%84%E5%88%9D%E5%A7%8B%E5%8C%96%E5%8F%8A%E8%B5%8B%E5%80%BC\" >3.12 \u5b57\u7b26\u4e32\u6307\u9488\u548c\u5b57\u7b26\u6570\u7ec4\u7684\u521d\u59cb\u5316\u53ca\u8d4b\u503c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#313_%E5%87%BD%E6%95%B0%E6%8C%87%E9%92%88\" >3.13 \u51fd\u6570\u6307\u9488<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#314_%E5%85%A8%E5%B1%80%E5%8F%98%E9%87%8F%E5%92%8C%E5%B1%80%E9%83%A8%E5%8F%98%E9%87%8F%E5%90%8C%E5%90%8D\" >3.14 \u5168\u5c40\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\u540c\u540d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#315_%E6%A0%BC%E5%BC%8F%E6%B3%A8%E6%84%8F\" >3.15 \u683c\u5f0f\u6ce8\u610f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3151_%E6%B5%AE%E7%82%B9%E6%95%B0%E8%B5%8B%E5%80%BC\" >3.15.1 \u6d6e\u70b9\u6570\u8d4b\u503c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3152_%E4%BB%A3%E7%A0%81%E7%A9%BA%E6%A0%BC%E6%A0%BC%E5%BC%8F\" >3.15.2 \u4ee3\u7801\u7a7a\u683c\u683c\u5f0f<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#316_%E5%B8%A6%E5%8F%82%E5%AE%8F%E5%AE%9A%E4%B9%89\" >3.16 \u5e26\u53c2\u5b8f\u5b9a\u4e49<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#317_%E8%B5%8B%E5%80%BC%E8%A1%A8%E8%BE%BE%E5%BC%8F%E7%9A%84%E5%8F%96%E5%80%BC\" >3.17 \u8d4b\u503c\u8868\u8fbe\u5f0f\u7684\u53d6\u503c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#318_%E6%A0%87%E8%AF%86%E7%AC%A6%E5%91%BD%E5%90%8D\" >3.18 \u6807\u8bc6\u7b26\u547d\u540d<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#319_%E4%BA%8C%E7%BB%B4%E6%95%B0%E7%BB%84%E6%8C%87%E9%92%88%E5%B1%82%E9%9D%A2%E7%90%86%E8%A7%A3\" >3.19 \u4e8c\u7ef4\u6570\u7ec4\u6307\u9488\u5c42\u9762\u7406\u89e3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3191_%E7%90%86%E8%A7%A3\" >3.19.1 \u7406\u89e3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3192_%E4%BC%A0%E5%8F%82\" >3.19.2 \u4f20\u53c2<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#320_%E9%9D%99%E6%80%81%E5%8F%98%E9%87%8F%E4%BD%BF%E7%94%A8\" >3.20 \u9759\u6001\u53d8\u91cf\u4f7f\u7528<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#321_%E8%BF%9E%E7%BB%AD%E8%B5%8B%E5%80%BC\" >3.21 \u8fde\u7eed\u8d4b\u503c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#322_%E6%96%87%E4%BB%B6%E8%AF%BB%E5%86%99\" >3.22 \u6587\u4ef6\u8bfb\u5199<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3221_fopen_%E6%A8%A1%E5%BC%8F\" >3.22.1 fopen \u6a21\u5f0f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#3222_%E5%AE%9E%E4%BE%8B\" >3.22.2 \u5b9e\u4f8b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-40\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#323_%E7%BB%93%E6%9E%84%E4%BD%93%E5%AE%9A%E4%B9%89%E5%8F%8A%E5%AE%9E%E4%BE%8B%E5%8C%96\" >3.23 \u7ed3\u6784\u4f53\u5b9a\u4e49\u53ca\u5b9e\u4f8b\u5316<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-41\" href=\"https:\/\/blog.iyatt.com\/?p=9266\/#4_%E5%B8%B8%E8%A7%81%E7%AE%97%E6%B3%95%E6%97%B6%E9%97%B4%E5%A4%8D%E6%9D%82%E5%BA%A6\" >4 \u5e38\u89c1\u7b97\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6<\/a><\/li><\/ul><\/nav><\/div>\n<p>2023.5.14 \u67e5\u5230\u6210\u7ee9\u4e86\uff0c\u4e00\u628a\u8fc7\uff0c\u5206\u6570\u4e3a\u826f\u597d\uff0c\u4e5f\u5c31\u662f\u516b\u5341\u51e0\u5206\u3002\u81ea\u8ba4\u4e3a\u7684\u8bdd\u64cd\u4f5c\u9898\u768460\u5206\u6211\u662f\u62ff\u6ee1\u4e86\uff0c\u6263\u5206\u5e94\u8be5\u662f\u9009\u62e9\u9898\u3002\u6211\u4ee5\u4e3a\u8003\u573a\u4e0d\u63d0\u4f9b\u8349\u7a3f\u7eb8\uff08\u5b9e\u9645\u53ef\u4ee5\uff09\uff0c\u7b14\u90fd\u6ca1\u5e26\uff0c\u6240\u4ee5\u9009\u62e9\u9898\u4e2d\u7ed9\u4ee3\u7801\u95ee\u8fd0\u884c\u7ed3\u679c\u7684\uff08\u5360\u5927\u5934\uff09\uff0c\u6211\u4e5f\u61d2\u5f97\u53bb\u5fc3\u7b97\u6162\u6162\u63a8\uff0c\u57fa\u672c\u770b\u4e00\u4e0b\u5c31\u9009\uff0c\u8fd8\u6709\u4e9b\u95ee\u57fa\u7840\u6982\u5ff5\u6211\u4e0d\u662f\u5f88\u6e05\u695a\u7684\u4e5f\u662f\u5e26\u7740\u611f\u89c9\u9009\u7684\uff0c\u6700\u7ec8\u5206\u6570\u8fd8\u662f\u5728\u80fd\u63a5\u53d7\u8303\u56f4\u5185\u3002<\/p>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1709984712930.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 922px; --smush-placeholder-aspect-ratio: 922\/654;\" \/><\/p>\n<h1><span class=\"ez-toc-section\" id=\"1_%E5%8F%91%E5%8F%91%E6%81%BC%E9%AA%9A\"><\/span>1 \u53d1\u53d1\u607c\u9a9a<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>2023\/2\/24<br \/>\n\u6700\u8fd1\u5f00\u59cb\u51c6\u5907\u8ba1\u7b97\u673a\u4e8c\u7ea7 C \u8bed\u8a00\u8003\u8bd5\uff0c\u5237\u9898\u9047\u5230\u7684\u60c5\u51b5\u53ef\u6298\u817e\u6211\u4e86\u3002\u5e73\u65f6\u6211\u5199 C \u4ee3\u7801\u662f\u89c4\u8303\u4e86\u683c\u5f0f\u7684\uff0c\u4f46\u662f\u8fd9\u4e2a\u9898\u76ee\u611f\u89c9\u662f\u4e3a\u4e86\u8003\u5230\u4eba\u800c\u8003\u4eba\u7684\u611f\u89c9\uff0c\u9898\u76ee\u7684\u4ee3\u7801\u6bd4\u8f83\u5201\u94bb\uff0c\u8c01\u641e\u5f00\u53d1\u50cf\u5b83\u8fd9\u4e48\u5199\u4ee3\u7801\u3002\u4e0d\u4ec5\u662f\u683c\u5f0f\u4e71\uff0c\u800c\u4e14\u6709\u4e9b\u662f C \u8bed\u8a00\u6807\u51c6\u90fd\u6ca1\u89c4\u5b9a\u7684\u5199\u6cd5\uff0c\u5168\u770b\u7f16\u8bd1\u5668\u600e\u4e48\u5b9e\u73b0\uff0c\u8fd8\u6709\u4e9b\u5199\u6cd5\u662f\u6545\u610f\u8ba9\u4eba\u4e0d\u80fd\u76f4\u63a5\u770b\u51fa\u7ed3\u679c\u800c\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\u7684\uff0c\u660e\u660e\u53ef\u4ee5\u5199\u5f97\u5f88\u6e05\u6670\uff0c\u4f46\u662f\u975e\u8981\u5199\u5f97\u6df7\u4e71\u6765\u8003\u4eba\u3002<br \/>\n\u8fd9\u91cc\u6211\u5c31\u603b\u7ed3\u4e00\u4e0b\u4e00\u4e9b\u53ef\u80fd\u9047\u5230\u7684\u60c5\u666f\uff0c\u4ee5\u8003\u8bd5\u8981\u6c42\u7684\u73af\u5883\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n<h1><span class=\"ez-toc-section\" id=\"2_%E7%8E%AF%E5%A2%83\"><\/span>2 \u73af\u5883<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>Microsoft Visual C++ 2010 \u5b66\u4e60\u7248<\/p>\n<h1><span class=\"ez-toc-section\" id=\"3_%E6%83%85%E6%99%AF\"><\/span>3 \u60c5\u666f<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\u4e0b\u9762\u7684\u5185\u5bb9\u6392\u5e03\u987a\u5e8f\u5e76\u6ca1\u6709\u903b\u8f91\u5173\u7cfb\uff0c\u53ea\u662f\u9898\u76ee\u9047\u5230\u6216\u8005\u7a81\u7136\u60f3\u5230\u7684\u60c5\u666f\u5c31\u5199\u4e0b\u6765<\/p>\n<h2><span class=\"ez-toc-section\" id=\"31_VC2010_%E8%BF%90%E8%A1%8C%E4%B8%80%E9%97%AA%E8%80%8C%E8%BF%87\"><\/span>3.1 VC++2010 \u8fd0\u884c\u4e00\u95ea\u800c\u8fc7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8fd9\u4e2a\u672c\u8eab\u662f\u6b63\u5e38\u7684\u73b0\u8c61\uff0c\u7a0b\u5e8f\u8fd0\u884c\u7ed3\u675f\u4e86\uff0c\u4e3a\u4e86\u8fd0\u884c\u5b83\u800c\u521b\u5efa\u7684\u63a7\u5236\u53f0\u7a97\u53e3\u81ea\u7136\u4f1a\u5173\u95ed\u3002\u4e3a\u4e86\u4e0d\u8ba9\u5b83\u81ea\u52a8\u5173\u95ed\uff0c\u5c31\u5f97\u5728\u5173\u95ed\u63a7\u5236\u53f0\u7a97\u53e3\u524d\u963b\u585e\u3002<br \/>\n\u5c31\u6709\u4e24\u7c7b\u601d\u8def\uff0c\u4e00\u7c7b\u662f\u7a0b\u5e8f\u5185\u90e8\u963b\u585e\uff0c\u6bd4\u5982\u4f7f\u7528\u8f93\u5165\u51fd\u6570\u6216\u8005\u8c03\u7528 pause \u547d\u4ee4<\/p>\n<p>\uff081\uff09<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    getchar(); \/\/ \u653e\u5728\u7a0b\u5e8f\u672b\u5c3e\n}<\/code><\/pre>\n<p>\u6309\u56de\u8f66\u952e\u7ed3\u675f<\/p>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291076654.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 455px; --smush-placeholder-aspect-ratio: 455\/285;\" \/><\/p>\n<p>\uff082\uff09<\/p>\n<pre><code class=\"language-c\">#include &lt;stdlib.h&gt;\n\nint main()\n{\n    system(&quot;pause&quot;); \/\/ \u653e\u5728\u7a0b\u5e8f\u672b\u5c3e\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291233637.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 443px; --smush-placeholder-aspect-ratio: 443\/169;\" \/><\/p>\n<hr \/>\n<p>\u53e6\u5916\u4e00\u7c7b\u601d\u8def\u662f\u7531 VC++2010 \u8fdb\u884c\u63a7\u5236<\/p>\n<p>\uff081\uff09\u5728 return 0 \u524d\u9762\u8bbe\u7f6e\u65ad\u70b9<\/p>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291450251.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 260px; --smush-placeholder-aspect-ratio: 260\/154;\" \/><\/p>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291420987.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 195px; --smush-placeholder-aspect-ratio: 195\/136;\" \/><\/p>\n<p>\uff082\uff09\u4f7f\u7528 VC++2010 \u63d0\u4f9b\u7684\u76f4\u63a5\u8fd0\u884c<\/p>\n<p>\u70b9\u5f00\u9879\u76ee\u5c5e\u6027<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291569536.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 307px; --smush-placeholder-aspect-ratio: 307\/441;\" \/><\/p>\n<p>\u914d\u7f6e\u5c5e\u6027-\u94fe\u63a5\u5668-\u7cfb\u7edf-\u5b50\u7cfb\u7edf\uff0c\u9009\u63a7\u5236\u53f0<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291606909.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 912px; --smush-placeholder-aspect-ratio: 912\/363;\" \/><\/p>\n<p>\u8fd0\u884c\u7a0b\u5e8f\u7684\u65f6\u5019\u6309 Ctrl+F5\uff08\u4e0d\u8c03\u8bd5\u76f4\u63a5\u8fd0\u884c\uff09\uff0c\u5e73\u65f6\u8c03\u8bd5\u8fd0\u884c\u662f\u6309\u7684 F5<br \/>\n\u8003\u8bd5\u7684\u65f6\u5019\u64cd\u4f5c\u9898\u7684\u5c5e\u6027\u662f\u5df2\u7ecf\u8bbe\u7f6e\u6210\u63a7\u5236\u53f0\u7684\uff0c\u4e5f\u5c31\u662f\u53ef\u4ee5\u76f4\u63a5\u7528 Ctrl+F5<\/p>\n<p>\u8fd9\u6837\u8fd0\u884c\u4f1a\u81ea\u52a8\u7ed9\u4f60\u8c03\u7528 pause \u547d\u4ee4<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677291911702.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 282px; --smush-placeholder-aspect-ratio: 282\/122;\" \/><\/p>\n<p>\u8ba1\u7b97\u673a\u4e8c\u7ea7\u8fd9\u4e2a\u8bf4\u5b9e\u8bdd\u8c03\u8bd5\u4e0d\u8c03\u8bd5\u610f\u4e49\u4e0d\u5927\uff0c\u5c31\u90a3\u4e48\u70b9\u4ee3\u7801\uff0c\u903b\u8f91\u5c42\u6b21\u4e0d\u4f1a\u590d\u6742\u3002\u800c\u4e14\u5728\u4e8c\u7ea7\u8fd9\u4e2a\u6c34\u5e73\u4e0a\uff0c\u771f\u7684\u4f1a\u7528\u8c03\u8bd5\u529f\u80fd\u7684\u4eba\u6709\u591a\u5c11\uff0c\u5982\u679c\u4e0d\u4f1a\u7528\u8c03\u8bd5\u529f\u80fd\uff0c\u90a3\u4e48\u76f4\u63a5\u8fd0\u884c\u548c\u8c03\u8bd5\u8fd0\u884c\u5c31\u6ca1\u5565\u533a\u522b\uff0c\u4e0d\u5982\u600e\u4e48\u65b9\u4fbf\u600e\u4e48\u6765\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"32_%E5%85%A5%E5%8F%A3%E5%87%BD%E6%95%B0_main\"><\/span>3.2 \u5165\u53e3\u51fd\u6570 main<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u4e09\u5341\u591a\u5e74\u524d\u7684 C89 \u5c31\u89c4\u5b9a\u4e86\u662f int main\uff0c\u4e0d\u8981\u5199 void main \u4e86\u3002\u8003\u8bd5\u9898\u76ee\u53ef\u80fd\u51fa\u73b0 void main\uff0c\u4f46\u662f\u8003\u5b8c\u540e\u81ea\u5df1\u8981\u77e5\u9053\u4e0d\u80fd\u8fd9\u4e48\u5199\uff08\u8f6f\u4ef6\u5f00\u53d1\u6309\u8fd9\u4e2a\u6765\uff0c\u5355\u7247\u673a\u5f00\u53d1\u4f8b\u5916\uff09<br \/>\n<img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1695799402095.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 1904px; --smush-placeholder-aspect-ratio: 1904\/633;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"33_gets\"><\/span>3.3 gets<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C11 \u6807\u51c6\u4e2d\u5df2\u7ecf\u5220\u9664\u4e86 gets \u51fd\u6570\uff0c\u505a\u5f00\u53d1\u7684\u65f6\u5019\u4e5f\u4e0d\u8981\u7528\u4e86\u3002\u8fd9\u4e2a\u51fd\u6570\u4e0d\u4f1a\u68c0\u67e5\u50a8\u5b58\u7a7a\u95f4\u662f\u5426\u8db3\u591f\uff0c\u4f60\u8f93\u5165\u591a\u5c11\u5c31\u4f1a\u5f3a\u884c\u5199\u5165\u591a\u5c11\uff0c\u53ef\u80fd\u4f1a\u9020\u6210\u5185\u5b58\u6ea2\u51fa<\/p>\n<h3><span class=\"ez-toc-section\" id=\"331_%E5%8F%98%E9%87%8F%E5%AE%9A%E4%B9%89%E4%BD%8D%E7%BD%AE\"><\/span>3.3.1 \u53d8\u91cf\u5b9a\u4e49\u4f4d\u7f6e<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C89 \u8981\u6c42\u53d8\u91cf\u53ea\u80fd\u5728\u5934\u90e8\u4f4d\u7f6e\u5b9a\u4e49\uff0c\u5373\u5728\u67d0\u4e2a\u51fd\u6570\u5185\u5b9a\u4e49\u53d8\u91cf\uff0c\u53ea\u80fd\u5728\u6700\u5f00\u5934\u7684\u4f4d\u7f6e\uff0c\u5728\u5b9a\u4e49\u53d8\u91cf\u7684\u8bed\u53e5\u4e4b\u524d\u4e0d\u80fd\u6709\u5176\u5b83\u6267\u884c\u8bed\u53e5\u3002\u800c C99 \u53d6\u6d88\u4e86\u9650\u5236\uff0c\u4ece\u6b64\u4e4b\u540e\u7684\u6807\u51c6\u90fd\u6ca1\u6709\u9650\u5236\uff0c\u53ea\u8981\u5728\u4f7f\u7528\u53d8\u91cf\u4e4b\u524d\u5b9a\u4e49\u4e86\u5c31\u53ef\u4ee5\u3002VC++6.0 \u4ee5\u524d\u7528\u8fc7\uff0c\u53ea\u80fd\u5728\u5934\u90e8\u5b9a\u4e49\uff0c\u8fd9\u4e2a VC++2010 \u4f9d\u7136\u53ea\u80fd\u5728\u5934\u90e8\u5b9a\u4e49\uff0c\u8fd9\u4e2a\u6211\u662f\u6709\u70b9\u65e0\u8bed\uff0c\u4e0a\u4e00\u4e2a\u6807\u51c6\u90fd\u51fa\u4e86\u5341\u5e74\u4e86\u8fd8\u6ca1\u652f\u6301\u8fd9\u4e2a\u7279\u6027\uff08\u540e\u9762\u7684\u6211\u7528\u8fc7 2019 \u548c 2022 \u53ef\u4ee5\uff09\u3002<\/p>\n<p>\u53ea\u80fd\u5728\u5934\u90e8\u5b9a\u4e49\u4e0b\u9762\u8fd9\u79cd\u60c5\u51b5\u5c31\u4e0d\u652f\u6301<\/p>\n<pre><code class=\"language-c\">for (int i = 0; i &lt; 10; ++i)<\/code><\/pre>\n<p>\u53ea\u80fd\u5199<\/p>\n<pre><code class=\"language-c\">int i; \/\/ \u8981\u653e\u5728\u5934\u90e8\uff0c\u5728\u5b9a\u4e49\u53d8\u91cf\u4f4d\u7f6e\u7684\u524d\u9762\u4e0d\u80fd\u6709\u5176\u5b83\u903b\u8f91\u6267\u884c\u8bed\u53e5\n\nfor (i = 0; i &lt; 10; ++i)<\/code><\/pre>\n<p>\u521a\u8f6c\u8fc7\u6765\u7528 VC++2010 \u7ec3\u4e60\u65f6\u5c31\u9047\u5230\u8fc7\u5b9a\u4e49\u4f4d\u7f6e\u4e0d\u5728\u5934\u90e8\u5bfc\u81f4\u7684\u9519\u8bef\uff0c\u83ab\u540d\u5176\u5999\u4e86\u534a\u5929\u624d\u53cd\u5e94\u8fc7\u6765<\/p>\n<h2><span class=\"ez-toc-section\" id=\"34_%E6%95%B0%E6%8D%AE%E7%B1%BB%E5%9E%8B%E5%A4%A7%E5%B0%8F\"><\/span>3.4 \u6570\u636e\u7c7b\u578b\u5927\u5c0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7ec3\u4e60\u7684\u65f6\u5019\u6211\u6709\u9047\u5230\u6709\u9898\u95ee VC++6.0 \u4e0b\u67d0\u4e9b\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u5927\u5c0f\uff0c\u5e94\u8be5\u662f\u8001\u9898\u76ee\uff0c\u6211\u6309 VC++2010 \u7684\u9009\u7684\u7b54\u6848\u6ca1\u95ee\u9898\uff0c\u81f3\u4e8e\u662f\u4e0d\u662f\u90fd\u4e00\u6837\u6211\u4e5f\u4e0d\u6e05\u695a\u4e86\u3002\u4e4b\u524d\u7528 VC++6.0 \u90fd\u662f\u4e09\u5e74\u524d\u5927\u4e00\u4e0a C \u8bed\u8a00\u8bfe\u7a0b\u7684\u65f6\u5019\u4e86\uff0c\u65e2\u7136\u73b0\u5728\u7684 NCRE 2 \u8981\u6c42\u7684\u662f VC++2010\uff0c\u90a3\u5c31\u4ee5\u5b83\u7684\u60c5\u51b5\u6765\u8003\u8651\u603b\u6ca1\u9519\u3002<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    printf(&quot;char %u\\n&quot;, sizeof(char));\n    printf(&quot;short %u\\n&quot;, sizeof(short));\n    printf(&quot;int %u\\n&quot;, sizeof(int));\n    printf(&quot;long %u\\n&quot;, sizeof(long));\n    printf(&quot;long long %u\\n&quot;, sizeof(long long));\n    printf(&quot;float %u\\n&quot;, sizeof(float));\n    printf(&quot;long float %u\\n&quot;, sizeof(long float));\n    printf(&quot;double %u\\n&quot;, sizeof(double));\n    printf(&quot;long double %u\\n&quot;, sizeof(long double));\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677236664864.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 247px; --smush-placeholder-aspect-ratio: 247\/213;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"35_if\"><\/span>3.5 if<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"351_%E6%8E%A7%E5%88%B6%E8%8C%83%E5%9B%B4\"><\/span>3.5.1 \u63a7\u5236\u8303\u56f4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n    int b = 2;\n\n    if (0)\n    a = 4;\n    b = 4;\n\n    printf(&quot;a=%d\uff0cb=%d\\n&quot;, a, b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677237144725.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 211px; --smush-placeholder-aspect-ratio: 211\/95;\" \/><\/p>\n<p>if \u540c\u884c\u540e\u9762\u6ca1\u6709\u8bed\u53e5\u65f6\uff0cif \u7684\u4e0b\u4e00\u884c\u7531 if \u63a7\u5236<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n    int b = 2;\n\n    if (0) a = 3; b = 3;\n\n    printf(&quot;a=%d\uff0cb=%d\\n&quot;, a, b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677252574552.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 256px; --smush-placeholder-aspect-ratio: 256\/89;\" \/><\/p>\n<p>if \u540c\u884c\u540e\u6709\u8bed\u53e5\uff0c\u7b2c\u4e00\u4e2a\u8bed\u53e5\u7531 if \u63a7\u5236<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n    int b = 2;\n    int c = 3;\n\n    if (0) a = 4;\n    b = 4;\n    c = 4;\n\n    printf(&quot;a=%d\uff0cb=%d\uff0cc=%d\\n&quot;, a, b, c);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677237056657.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 246px; --smush-placeholder-aspect-ratio: 246\/80;\" \/><\/p>\n<p>if \u540e\u6709\u8bed\u53e5\uff0c\u4e0b\u4e00\u884c\u4e0d\u7531 if \u63a7\u5236<\/p>\n<p><strong>if \u540e\u7b2c\u4e00\u4e2a\u8bed\u53e5\u7531 if \u63a7\u5236\uff0c\u65e0\u8bba\u6392\u5e03\u683c\u5f0f<\/strong><\/p>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"352_else_%E5%8C%B9%E9%85%8D\"><\/span>3.5.2 else \u5339\u914d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int i;\n    for (i = 0; i &lt; 10; ++i)\n        if (i % 2 == 0)\n            if (i == 6)\n                printf(&quot;6 YES\\n&quot;);\n            else\n                printf(&quot;\u5076\u6570 %d\\n&quot;, i);\n        else\n            printf(&quot;\u5947\u6570 %d\\n&quot;, i);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677378716776.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 260px; --smush-placeholder-aspect-ratio: 260\/235;\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u51fa else \u9ed8\u8ba4\u4f1a\u5339\u914d<strong>\u5f53\u524d\u4f5c\u7528\u57df\u5185<\/strong>\u6700\u8fd1\u7684 if<\/p>\n<p>\u6211\u4e00\u822c\u8fd8\u662f\u4e60\u60ef\u90fd\u52a0\u4e0a\u5927\u62ec\u53f7\uff0c\u8fd9\u6837\u770b\u8d77\u6765\u4f1a\u66f4\u6e05\u6670\u4e00\u4e9b\uff0c\u53ea\u662f\u8003\u9898\u559c\u6b22\u4e0a\u9762\u90a3\u79cd\u683c\u5f0f\uff0c\u6240\u4ee5\u8fd8\u662f\u8981\u6e05\u695a\u903b\u8f91\u5173\u7cfb<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int i;\n    for (i = 0; i &lt; 10; ++i)\n    {\n        if (i % 2 == 0)\n        {\n            if (i == 6)\n            {\n                printf(&quot;6 YES\\n&quot;);\n            }\n            else\n            {\n                printf(&quot;\u5076\u6570 %d\\n&quot;, i);\n            }\n        }\n        else\n        {\n            printf(&quot;\u5947\u6570 %d\\n&quot;, i);\n        }\n    }\n}<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"36_switch\"><\/span>3.6 switch<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n\n    switch (a)\n    {\n    case 9:\n        printf(&quot;9\\n&quot;);\n    case 1:\n        printf(&quot;1\\n&quot;);\n    case 2:\n        printf(&quot;2\\n&quot;);\n    case 3:\n        printf(&quot;3\\n&quot;);\n    default:\n        printf(&quot;default\\n&quot;);\n    }\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677237601276.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 168px; --smush-placeholder-aspect-ratio: 168\/139;\" \/><\/p>\n<p>case \u5339\u914d\u9879\u4e2d\u6ca1\u6709\u6dfb\u52a0 break\uff0c\u90a3\u4e48\u4e0b\u4e00\u4e2a case \u4f1a\u63a5\u7740\u6267\u884c\uff0c\u5982\u679c\u4e5f\u6ca1\u6709 break\uff0c\u5219\u518d\u4e0b\u4e00\u4e2a\u63a5\u7740\u6267\u884c&#8230;&#8230;<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n\n    switch (a)\n    {\n    default:\n        printf(&quot;default\\n&quot;);\n        break;\n    case 9:\n        printf(&quot;9\\n&quot;);\n        break;\n    case 1:\n        printf(&quot;1\\n&quot;);\n        break;\n    case 2:\n        printf(&quot;2\\n&quot;);\n        break;\n    case 3:\n        printf(&quot;3\\n&quot;);\n        break;\n    }\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677237855694.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 178px; --smush-placeholder-aspect-ratio: 178\/101;\" \/><\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 7;\n\n    switch (a)\n    {\n    default:\n        printf(&quot;default\\n&quot;);\n        break;\n    case 9:\n        printf(&quot;9\\n&quot;);\n        break;\n    case 1:\n        printf(&quot;1\\n&quot;);\n        break;\n    case 2:\n        printf(&quot;2\\n&quot;);\n        break;\n    case 3:\n        printf(&quot;3\\n&quot;);\n        break;\n    }\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677237920212.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 267px; --smush-placeholder-aspect-ratio: 267\/102;\" \/><\/p>\n<p>default \u4e0d\u7ba1\u4f4d\u7f6e\u5728\u54ea\u91cc\uff0c\u90fd\u53ea\u6709\u5728 case \u65e0\u6cd5\u5339\u914d\u5230\u7684\u65f6\u5019\u624d\u5339\u914d default<\/p>\n<hr \/>\n<h2><span class=\"ez-toc-section\" id=\"37_%E8%87%AA%E5%A2%9E%E8%87%AA%E5%87%8F\"><\/span>3.7 \u81ea\u589e\u81ea\u51cf<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    printf(&quot;%d\\n&quot;, a++);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, ++a);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, a--);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, --a);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677304953056.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 242px; --smush-placeholder-aspect-ratio: 242\/149;\" \/><\/p>\n<p>\u524d\u589e\u53d6\u81ea\u589e\u540e\u7684\u503c\uff0c\u540e\u589e\u53d6\u539f\u503c\uff0c\u81ea\u51cf\u64cd\u4f5c\u6027\u8d28\u7c7b\u4f3c<\/p>\n<hr \/>\n<p>\u6ce8\u610f\u4e0b\u9762\u8fd9\u4e2a\u4f8b\u5b50\u7684\u60c5\u51b5\u5728\u5f00\u53d1\u4e2d\u4e0d\u8981\u4f7f\u7528\uff0c\u8fd9\u4e2a\u662f C \u8bed\u8a00\u6807\u51c6\u6ca1\u6709\u89c4\u5b9a\u7684\uff0c\u4e5f\u5c31\u662f\u5b9e\u9645\u4e0a\u6ca1\u6709\u7b54\u6848\u7684\u3002\u5177\u4f53\u600e\u4e48\u5904\u7406\u770b\u7f16\u8bd1\u5668\uff0c\u8fd9\u91cc\u7684\u60c5\u51b5\u4ec5\u5728\u8003\u8bd5\u8981\u6c42\u7684\u73af\u5883\u7684\u524d\u63d0\u4e0b<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    int b = ++a + ++a;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = ++a + a++;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = a++ + ++a;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = a++ + a++;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    printf(&quot;%d %d\\n&quot;, ++a, ++a);\n\n    a = 10;\n    printf(&quot;%d %d\\n&quot;, ++a, a++);\n\n    a = 10;\n    printf(&quot;%d %d\\n&quot;, a++, ++a);\n\n    a = 10;\n    printf(&quot;%d %d\\n&quot;, a++, a++);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677239161875.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 187px; --smush-placeholder-aspect-ratio: 187\/198;\" \/><\/p>\n<p>\u524d\u589e\u52a0\u524d\u589e\uff0c\u7b49\u4e8e\u4e24\u6b21\u81ea\u589e\u540e\u7684\u503c\u76f8\u52a0<br \/>\n\u524d\u589e\u548c\u540e\u589e\u76f8\u52a0\uff0c\u7b49\u4e8e\u4e00\u6b21\u81ea\u589e\u540e\u7684\u503c\u76f8\u52a0\uff08\u524d\u589e\u6709\u6548\uff0c\u540e\u589e\u65e0\u6548\uff09<br \/>\n\u540e\u589e\u52a0\u540e\u589e\uff0c\u7b49\u4e8e\u539f\u503c\u76f8\u52a0<br \/>\n<strong>\u5148\u4e0d\u7ba1\u52a0\u6cd5\uff0c\u53ea\u770b\u81ea\u589e\uff0c\u5982\u679c\u662f\u524d\u589e\u5c31\u6709\u6548\uff0c\u5982\u679c\u662f\u540e\u589e\u5c31\u65e0\u6548\uff0c\u5c06\u81ea\u589e\u540e\u7684\u503c\u76f8\u52a0<\/strong><\/p>\n<p>\u4e24\u6b21\u524d\u589e\u5404\u81ea\u7684\u53d6\u503c\uff0c\u90fd\u7b49\u4e8e\u4e24\u6b21\u81ea\u589e\u540e\u7684\u503c<br \/>\n\u524d\u589e\u548c\u540e\u589e\u5404\u81ea\u53d6\u503c\uff0c\u524d\u589e\u53d6\u4e24\u6b21\u81ea\u589e\u540e\u7684\u503c\uff0c\u540e\u589e\u53d6\u539f\u503c<br \/>\n\u540e\u589e\u548c\u524d\u589e\u5404\u81ea\u53d6\u503c\uff0c\u540e\u589e\u53d6\u4e00\u6b21\u81ea\u589e\u540e\u7684\u503c\uff0c\u524d\u589e\u53d6\u4e24\u6b21\u81ea\u589e\u540e\u7684\u503c<br \/>\n\u4e24\u6b21\u540e\u589e\u5404\u81ea\u53d6\u503c\uff0c\u7b2c\u4e00\u4e2a\u7b49\u4e8e\u81ea\u589e\u540e\u7684\u503c\uff0c\u540e\u4e00\u4e2a\u7b49\u4e8e\u539f\u503c<br \/>\n<strong>\u524d\u589e\u7684\u53d6\u503c\u662f\u524d\u589e\u548c\u540e\u589e\u90fd\u6709\u6548\u7684\u7d2f\u8ba1\u7ed3\u679c\uff0c\u540e\u589e\u7684\u53d6\u503c\u7b49\u4e8e\u53f3\u8fb9\u81ea\u589e\u4e00\u6b21\u540e\uff08\u5982\u679c\u6709\u7684\u8bdd\uff09\u7684\u7ed3\u679c<\/strong><\/p>\n<h2><span class=\"ez-toc-section\" id=\"38_%E5%92%8C_%E4%BC%98%E5%85%88%E7%BA%A7\"><\/span>3.8 = \u548c , \u4f18\u5148\u7ea7<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    int b;\n\n    b = ++a, ++a;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = ++a, a++;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = a++, ++a;\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = a++, a++;\n    printf(&quot;%d\\n&quot;, b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677241629315.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 133px; --smush-placeholder-aspect-ratio: 133\/115;\" \/><\/p>\n<p>\u8d4b\u503c\u8fd0\u7b97\u7684\u4f18\u5148\u7ea7\u9ad8\u4e8e\u9017\u53f7\u8fd0\u7b97\u7b26\uff0c\u6240\u4ee5\u9017\u53f7\u8fd0\u7b97\u53d1\u5de6\u8fb9\u7b2c\u4e00\u4e2a\u8868\u8fbe\u5f0f\u7684\u503c\u4f1a\u7528\u4e8e\u8d4b\u503c<\/p>\n<h2><span class=\"ez-toc-section\" id=\"39_%E9%80%97%E5%8F%B7%E8%BF%90%E7%AE%97%E7%AC%A6%E9%A1%BA%E5%BA%8F\"><\/span>3.9 \u9017\u53f7\u8fd0\u7b97\u7b26\u987a\u5e8f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    int b;\n\n    b = (++a, ++a);\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = (++a, a++);\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = (a++, ++a);\n    printf(&quot;%d\\n&quot;, b);\n\n    a = 10;\n    b = (a++, a++);\n    printf(&quot;%d\\n&quot;, b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677241786364.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 264px; --smush-placeholder-aspect-ratio: 264\/133;\" \/><\/p>\n<p>\u4ece\u5de6\u5f80\u53f3\u4f9d\u6b21\u8fdb\u884c\uff0c\u8fd9\u91cc\u4e0d\u7ba1\u5de6\u8fb9\u662f\u524d\u589e\u8fd8\u662f\u540e\u589e\uff0c\u53f3\u8fb9\u4f7f\u7528\u7684\u503c\u90fd\u662f\u5de6\u8fb9\u8fdb\u884c\u4e00\u6b21\u81ea\u589e\u540e\u7684\u503c<\/p>\n<h2><span class=\"ez-toc-section\" id=\"310_%E9%80%BB%E8%BE%91%E8%BF%90%E7%AE%97\"><\/span>3.10 \u903b\u8f91\u8fd0\u7b97<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8fdb\u884c\u903b\u8f91\u8fd0\u7b97\u65f6\uff0c\u5148\u9700\u8981\u5c06\u5341\u8fdb\u5236\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u3002<br \/>\n\u4e3e\u4e2a\u4f8b\u5b50\uff0c100 \u8f6c\u4e8c\u8fdb\u5236<br \/>\n100<code class=\"katex-inline\">\\div<\/code>2=50<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>0<br \/>\n50<code class=\"katex-inline\">\\div<\/code>2=25<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>0<br \/>\n25<code class=\"katex-inline\">\\div<\/code>2=12<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>1<br \/>\n12<code class=\"katex-inline\">\\div<\/code>2=6<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>0<br \/>\n6<code class=\"katex-inline\">\\div<\/code>2=3<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>0<br \/>\n3<code class=\"katex-inline\">\\div<\/code>2=1<code class=\"katex-inline\">\\cdot\\cdot\\cdot\\cdot\\cdot\\ \\cdot<\/code>1<br \/>\n\u53d6\u6700\u540e\u4e00\u6b21\u7684\u5546\u518d\u63a5\u4e0a\u4ece\u540e\u5f80\u524d\u7684\u4f59\u6570\uff0c\u5373\u4e3a 1100100<\/p>\n<p>\u903b\u8f91\u8fd0\u7b97\u7ed3\u679c\u8981\u8f6c\u56de\u5341\u8fdb\u5236<\/p>\n<p>1100100\uff08\u4e8c\u8fdb\u5236\uff09 = 1<code class=\"katex-inline\">\\times 2^6<\/code>+1<code class=\"katex-inline\">\\times 2^5<\/code>+0<code class=\"katex-inline\">\\times 2^4<\/code>+0<code class=\"katex-inline\">\\times 2^3<\/code>+1<code class=\"katex-inline\">\\times 2^2<\/code>+0<code class=\"katex-inline\">\\times 2^1<\/code>+0<code class=\"katex-inline\">\\times 2^0<\/code>\uff08\u5341\u8fdb\u5236\uff09<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3101_%E6%8C%89%E4%BD%8D%E4%B8%8E\"><\/span>3.10.1 \u6309\u4f4d\u4e0e &amp;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>01100100 &amp; 00101011\uff0c\u5bf9\u4f4d\u90fd\u4e3a 1 \u624d\u4e3a 1\uff0c\u5426\u5219\u4e3a 0\uff0c\u7ed3\u679c\u4e3a 00100000<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3102_%E6%8C%89%E4%BD%8D%E6%88%96\"><\/span>3.10.2 \u6309\u4f4d\u6216 |<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>01100100 | 00101011\uff0c\u5bf9\u4f4d\u6709\u4e00\u4e2a\u4e3a 1 \u5373\u4e3a 1\uff0c\u90fd\u4e3a 0 \u624d\u4e3a 0\uff0c\u7ed3\u679c\u4e3a 01101111<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3103_%E6%8C%89%E4%BD%8D%E5%BC%82%E6%88%96\"><\/span>3.10.3 \u6309\u4f4d\u5f02\u6216 ^<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>01100100 ^ 00101011\uff0c\u5bf9\u4f4d\u4e0d\u540c\u65f6\u4e3a 1\uff0c\u5426\u5219\u4e3a 0\uff0c\u7ed3\u679c\u4e3a 01001111<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3104_%E5%8F%96%E5%8F%8D%E8%BF%90%E7%AE%97%E7%AC%A6\"><\/span>3.10.4 \u53d6\u53cd\u8fd0\u7b97\u7b26 ~<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>~01100100 \u53d6\u53cd 1 \u53d8 0\uff0c0 \u53d8 1\uff0c\u7ed3\u679c\u4e3a 10011011<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3105_%E5%B7%A6%E7%A7%BB%E8%BF%90%E7%AE%97%E7%AC%A6_%3E\"><\/span>3.10.5 \u5de6\u79fb\u8fd0\u7b97\u7b26 &lt;&lt; \u548c \u53f3\u79fb\u8fd0\u7b97\u7b26 &gt;&gt;<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6b63\u6570\u539f\u7801\uff1a\u5c06\u6570\u5b57\u6309\u7edd\u5bf9\u5927\u5c0f\u8f6c\u4e3a\u4e8c\u8fdb\u5236\uff0c\u6bd4\u5982 10 \u7684\u539f\u7801 00001010\uff088\u4f4d\uff09<br \/>\n\u8d1f\u6570\u539f\u7801\uff1a\u5c06\u6570\u5b57\u6309\u7edd\u5bf9\u5927\u5c0f\u8f6c\u4e3a\u4e8c\u8fdb\u5236\uff0c\u6700\u9ad8\u4f4d\u53d6 1\uff0c-10 \u7684\u539f\u7801 10001010<\/p>\n<p>\u6b63\u6570\u53cd\u7801\uff1a\u4e0e\u539f\u7801\u76f8\u540c<br \/>\n\u8d1f\u6570\u53cd\u7801\uff1a\u539f\u7801\u9664\u7b26\u53f7\u4f4d\u90fd\u53d6\u53cd\uff0c-10 \u53cd\u7801 11110101<\/p>\n<p>\u6b63\u6570\u8865\u7801\uff1a\u4e0e\u539f\u7801\u76f8\u540c<br \/>\n\u8d1f\u6570\u8865\u7801\uff1a\u53cd\u7801\u52a0\u4e00\uff0c-10 \u8865\u7801 11110110<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    printf(&quot;%u\\n&quot;, a);\n\n    a = -10;\n    a = ~a;\n    printf(&quot;%u\\n&quot;, a);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677248983816.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 201px; --smush-placeholder-aspect-ratio: 201\/115;\" \/><\/p>\n<p>\u8fd9\u91cc int \u662f 4 \u5b57\u8282\uff0c\u5373 32 \u4f4d\u6570\u3002%d \u662f\u6309\u7167\u6709\u7b26\u53f7\u6570\u7684\u89c4\u5219\u6765\u89e3\u8bfb\uff0c\u800c %u \u5219\u662f\u6309\u7167\u65e0\u7b26\u53f7\u6570\u6765\u89e3\u8bfb\uff0c\u5373\u76f4\u63a5\u5f53\u4f5c\u6b63\u6570\uff0c\u6b63\u6570\u4e0d\u7ba1\u54ea\u79cd\u7801\u90fd\u662f\u7edd\u5bf9\u503c\u7684\u4e8c\u8fdb\u5236\uff0c\u65b9\u4fbf\u5206\u6790\u4e8c\u8fdb\u5236\u7684\u7edd\u5bf9\u6570\u503c\u3002<\/p>\n<p>10 \u7684\u8865\u7801\u662f 0000&#8230;1010\uff0832\u4f4d\uff09\uff0c-10 \u7684\u8865\u7801\u662f 1111&#8230;0110\uff0832\u4f4d\uff09\uff0c\u7136\u540e\u6211\u8fd9\u91cc\u53d6\u53cd\u4e86\u4e3a 0000&#8230;1001\uff0c\u76f4\u63a5\u6309\u65e0\u7b26\u53f7\u6570\u89e3\u8bfb\u5c31\u662f <code class=\"katex-inline\">1\\times2^3+1=9<\/code>\uff0c\u7ed3\u679c\u7b26\u5408\u4e0a\u9762\u7684\u8fd0\u884c\u7ed3\u679c\uff0c\u5373 C \u8bed\u8a00\u5e95\u5c42\u5b9e\u73b0\u662f\u7528\u7684\u8865\u7801<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    a &lt;&lt;= 3;\n    printf(&quot;%u\\n&quot;, a);\n\n    a = -10;\n    a &lt;&lt;= 3;\n    a = ~a;\n    printf(&quot;%u\\n&quot;, a);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677249704053.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 256px; --smush-placeholder-aspect-ratio: 256\/108;\" \/><\/p>\n<p>10 \u7684\u8865\u7801\u4e3a 0000&#8230;1010\uff0832\u4f4d\uff09\uff0c\u5de6\u79fb 3 \u4f4d\uff0c\u4f4e\u4f4d\u7528 0 \u586b\u5145\uff0c\u4e3a 0000&#8230;1010000\uff0c\u5bf9\u5e94\u5341\u8fdb\u5236\u4e3a <code class=\"katex-inline\">1\\times2^6+1\\times2^4=80<\/code>\uff0c\u7b26\u5408\u8fd0\u884c\u7ed3\u679c<br \/>\n-10 \u7684\u8865\u7801\u4e3a 1111&#8230;0110\uff0832\u4f4d\uff09\uff0c\u5de6\u79fb 3 \u4f4d\uff0c\u9ad8\u4f4d\u629b\u5f03\uff0c\u4f4e\u4f4d 0 \u586b\u5145\uff0c\u4e3a 1111&#8230;0110000\uff0c\u53d6\u53cd\u4e3a 0000&#8230;1001111\uff0c\u5bf9\u5e94\u5341\u8fdb\u5236\u4e3a<code class=\"katex-inline\">2^6+2^3+2^2+2+1=79<\/code>\uff0c\u7b26\u5408\u8fd0\u884c\u7ed3\u679c<\/p>\n<hr \/>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    a &gt;&gt;= 2;\n    printf(&quot;%u\\n&quot;, a);\n\n    a = -10;\n    a &gt;&gt;= 2;\n    a = ~a;\n    printf(&quot;%u\\n&quot;, a);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677250200104.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 221px; --smush-placeholder-aspect-ratio: 221\/102;\" \/><\/p>\n<p>10 \u7684\u8865\u7801\u4e3a 0000&#8230;1010\uff0832\u4f4d\uff09\uff0c\u53f3\u79fb 2 \u4f4d\uff0c\u9ad8\u4f4d\u4e3a 0\uff0c\u7528 0 \u586b\u5145\uff0c\u53f3\u8fb9\u629b\u5f03\uff0c\u4e3a 0000&#8230;0010\uff0c\u5bf9\u5e94\u5341\u8fdb\u5236\u4e3a 2\uff0c\u7b26\u5408\u8fd0\u884c\u7ed3\u679c<br \/>\n-10 \u7684\u8865\u7801\u4e3a 1111&#8230;0110\uff0832\u4f4d\uff09\uff0c\u53f3\u79fb 2 \u4f4d\uff0c\u9ad8\u4f4d\u4e3a 1\uff0c\u7528 1 \u586b\u5145\uff0c\u53f3\u8fb9\u629b\u5f03\uff0c\u4e3a 1111&#8230;1101\uff0c\u53d6\u53cd\u4e3a 0000.\u3002\u30020010\uff0c\u5bf9\u5e94\u5341\u8fdb\u5236\u4e3a 2\uff0c\u7b26\u5408\u8fd0\u884c\u7ed3\u679c<\/p>\n<hr \/>\n<p>\u4e0a\u9762\u662f\u4ece\u539f\u7406\u5c42\u9762\u8fdb\u884c\u7406\u89e3\uff0c\u6b63\u6570\u7684\u4f4d\u79fb\u5b9e\u9645\u4e0a\u5e76\u4e0d\u9700\u8981\u8f6c\u4e3a\u4e8c\u8fdb\u5236\u8fdb\u884c\u5904\u7406\u3002\u5148\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5341\u8fdb\u5236\u7684 10000 \u6309\u7167\u5341\u8fdb\u5236\u53f3\u79fb 2 \u4f4d\uff0c\u5c31\u53d8\u6210\u4e86 100\uff0c\u6309\u7167\u5341\u8fdb\u5236\u5de6\u79fb\u4e24\u4f4d\u5c31\u53d8\u6210 1000000\uff0c\u4f4d\u79fb n \u4f4d\u5c31\u662f\u4e58\u4ee5\uff08\u5de6\uff09\/\u9664\u4ee5\uff08\u53f3\uff0910 \u7684 n \u6b21\u65b9\u3002\u653e\u5230\u4e8c\u8fdb\u5236\u5c42\u9762\u5904\u7406\u5c31\u662f 2 \u7684 n \u6b21\u65b9\uff0c100 \u5de6\u79fb\uff08\u9ed8\u8ba4\u4e8c\u8fdb\u5236\uff092 \u4f4d\u5c31\u662f <code class=\"katex-inline\">100\\times2^2<\/code>\uff0c\u53f3\u79fb 2 \u4f4d\u5c31\u662f <code class=\"katex-inline\">100\\div2^2<\/code><\/p>\n<p>\u81f3\u4e8e\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u8865\u7801\u8868\u793a\u6570\u5b57\uff1f\u8fd9\u662f\u56e0\u4e3a\u8ba1\u7b97\u673a CPU \u53ea\u6709\u52a0\u6cd5\u8ba1\u7b97\u5668\uff0c\u8865\u7801\u53ef\u4ee5\u5c06\u5176\u5b83\u8fd0\u7b97\u8f6c\u4e3a\u52a0\u6cd5\u548c\u4f4d\u79fb\u6765\u5904\u7406\u3002\u6bd4\u5982\u51cf\u6cd5 10 &#8211; 9 = 10 + (-9) = 00001010 + 11110111 = 00000001 = 1<\/p>\n<h2><span class=\"ez-toc-section\" id=\"311_%E6%95%B4%E6%95%B0%E6%95%B0%E7%BB%84%E5%88%9D%E5%A7%8B%E5%8C%96\"><\/span>3.11 \u6574\u6570\u6570\u7ec4\u521d\u59cb\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\n#define C   4\n\nvoid print1(int num[], int c)\n{\n    int i;\n    for (i = 0; i &lt; c; ++i)\n    {\n        printf(&quot;%d &quot;, num[i]);\n    }\n    printf(&quot;\\n--------------------\\n&quot;);\n}\n\nvoid print2(int r, int num[][C])\n{\n    int i, j;\n    for (i = 0; i &lt; r; ++i)\n    {\n        for (j = 0; j &lt; C; ++j)\n        {\n            printf(&quot;%d &quot;, num[i][j]);\n        }\n        printf(&quot;\\n&quot;);\n    }\n    printf(&quot;--------------------\\n&quot;);\n}\n\nint main()\n{\n    int num1[] = {1, 2, 3};\n    int num2[4] = {1, 2, 3};\n    \/\/int num3[] = {{1, 2, 3}}; \/\/ \u9519\u8bef\n    int num4[][C] = {{1, 2, 3}, 4, 5};\n    \/\/int num5[][C] = {{1, 2, 3, 4, 5}, 6, 7, 8}; \/\/ \u521d\u59cb\u5316\u5217\u6570\u4e0d\u5339\u914d\n    \/\/int num6[2][C] = {{1, 2}, {3, 4}, {5, 6}}; \/\/ \u521d\u59cb\u5316\u884c\u6570\u4e0d\u5339\u914d\n    int num7[][C] = {1, 2, 3, 4, {5, 6}};\n    \/\/int num8[][C] = {1, 2, 3, {4, 5, 6}}; \/\/ \u521d\u59cb\u5316\u5217\u6570\u4e0d\u5339\u914d\n    int num9[][C] = {{1, 2, 3}, {4, 5, 6}};\n\n    print1(num1, 3);\n    print1(num2, 4);\n    print2(2, num4);\n    print2(2, num7);\n    print2(2, num9);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677257452155.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 220px; --smush-placeholder-aspect-ratio: 220\/264;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"312_%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%8C%87%E9%92%88%E5%92%8C%E5%AD%97%E7%AC%A6%E6%95%B0%E7%BB%84%E7%9A%84%E5%88%9D%E5%A7%8B%E5%8C%96%E5%8F%8A%E8%B5%8B%E5%80%BC\"><\/span>3.12 \u5b57\u7b26\u4e32\u6307\u9488\u548c\u5b57\u7b26\u6570\u7ec4\u7684\u521d\u59cb\u5316\u53ca\u8d4b\u503c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nvoid print(char *s)\n{\n    printf(&quot;%s\\n&quot;, s);\n}\n\nint main()\n{\n    char *s1 = &quot;abcd&quot;;\n    char *s2 = {&quot;abcd&quot;};\n\n    char s3[] = &quot;abcd&quot;;\n    char s4[] = {&quot;abcd&quot;};\n\n    \/\/s1 = {&quot;1234&quot;}; \/\/ \u9519\u8bef\n    s2 = &quot;1234567890&quot;;\n\n    \/\/s3 = &quot;1234&quot;; \/\/ \u9519\u8bef\n    \/\/s4 = {&quot;1234&quot;}; \/\/ \u9519\u8bef\n\n    print(s1);\n    print(s2);\n    print(s3);\n    print(s4);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677289715443.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 237px; --smush-placeholder-aspect-ratio: 237\/116;\" \/><\/p>\n<p>\u5b57\u7b26\u4e32\u6307\u9488\u548c\u5b57\u7b26\u6570\u7ec4\u521d\u59cb\u5316\u53ef\u4ee5\u52a0\u5927\u62ec\u53f7\u4e5f\u53ef\u4ee5\u4e0d\u52a0\u3002\u5b57\u7b26\u4e32\u6570\u7ec4\u521d\u59cb\u5316\u540e\uff0c\u540e\u9762\u53ef\u4ee5\u4fee\u6539\u6307\u5411\uff08\u4f46\u4e0d\u80fd\u7528\u5927\u62ec\u53f7\uff09\uff0c\u6307\u5411\u5730\u5740\u53d8\u4e86\uff0c\u5219\u503c\u53ef\u80fd\u4f1a\u6539\u53d8\u3002\u800c\u5b57\u7b26\u6570\u7ec4\u5c31\u4e0d\u80fd\u4f7f\u7528\u76f4\u63a5\u8d4b\u503c\u5b57\u7b26\u4e32\u7684\u65b9\u5f0f\u4fee\u6539\u4e86\uff0c\u8981\u4e48\u81ea\u5df1\u5b9e\u73b0\u904d\u5386\uff0c\u4e00\u4e2a\u5b57\u7b26\u4e00\u4e2a\u5b57\u7b26\u7684\u4fee\u6539\uff0c\u6216\u8005\u4f7f\u7528\u6807\u51c6\u5e93\u7684\u5b57\u7b26\u4e32\/\u5185\u5b58\u62f7\u8d1d\u51fd\u6570\u4e4b\u7c7b\u7684\u8fdb\u884c\u5b57\u7b26\u4e32\u8d4b\u503c\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"313_%E5%87%BD%E6%95%B0%E6%8C%87%E9%92%88\"><\/span>3.13 \u51fd\u6570\u6307\u9488<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\n\/\/ \u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u8fd4\u56de\u503c\nint func1(int x)\n{\n    printf(&quot;Hello %d\\n&quot;, x);\n    return x * x;\n}\n\n\/\/ \u6307\u9488\u7c7b\u578b\u7684\u8fd4\u56de\u503c\nint *func2(int *x)\n{\n    printf(&quot;World %d\\n&quot;, *x);\n    *x *= *x;\n    return x;\n}\n\n\/\/ \u65e0\u8fd4\u56de\u503c\nvoid func3()\n{\n    printf(&quot;Hello World!\\n&quot;);\n}\n\nint main()\n{\n    int (*f1)(int x);\n    int r1;\n    int *(*f2)(int *x);\n    int *r2;\n    int x2;\n    void (*f3)();\n\n    f1 = func1; \/\/ \u6307\u5411\u51fd\u6570\n    r1 = (*f1)(5);\n    printf(&quot;%d\\n&quot;, r1);\n    f1 = &amp;func1; \/\/ \u6307\u5411\u51fd\u6570\n    (*f1)(4);\n\n    f2 = func2;\n    x2 = 9;\n    r2 = (*f2)(&amp;x2);\n    printf(&quot;%d\\n&quot;, *r2);\n\n    f3 = func3;\n    f3();\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677306085991.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 275px; --smush-placeholder-aspect-ratio: 275\/171;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"314_%E5%85%A8%E5%B1%80%E5%8F%98%E9%87%8F%E5%92%8C%E5%B1%80%E9%83%A8%E5%8F%98%E9%87%8F%E5%90%8C%E5%90%8D\"><\/span>3.14 \u5168\u5c40\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\u540c\u540d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8fd9\u4e2a\u5728\u5f00\u53d1\u4e2d\u662f\u4e0d\u5efa\u8bae\u7684\uff0c\u5bb9\u6613\u6df7\u6dc6\uff0c\u589e\u5927\u5199\u51fa BUG \u7684\u673a\u7387\u3002<\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint a = 10;\n\nvoid func(int a)\n{\n    printf(&quot;%d\\n&quot;, a);\n}\n\nint main()\n{\n    printf(&quot;%d\\n&quot;, a);\n    func(20);\n    { \/\/ \u5927\u62ec\u53f7\u9650\u5236\u4f5c\u7528\u57df\uff0c\u4e0b\u9762\u5b9a\u4e49\u7684\u53d8\u91cf\u4ec5\u5728\u5185\u90e8\u6709\u6548\n        int a =30;\n        printf(&quot;%d\\n&quot;, a);\n    }\n    printf(&quot;%d\\n&quot;, a);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677310677316.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 247px; --smush-placeholder-aspect-ratio: 247\/137;\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u51fa\uff0c\u5168\u5c40\u53d8\u91cf\u548c\u5c40\u90e8\u53d8\u91cf\u540c\u540d\u65f6\uff0c\u4f7f\u7528\u7684\u662f\u5c40\u90e8\u53d8\u91cf\uff0c\u53ea\u6709\u5728\u67d0\u4e2a\u4f5c\u7528\u57df\u5185\u4e0d\u5b58\u5728\u540c\u540d\u5c45\u4e8e\u53d8\u91cf\u65f6\u624d\u4f7f\u7528\u5168\u5c40\u53d8\u91cf<\/p>\n<h2><span class=\"ez-toc-section\" id=\"315_%E6%A0%BC%E5%BC%8F%E6%B3%A8%E6%84%8F\"><\/span>3.15 \u683c\u5f0f\u6ce8\u610f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"3151_%E6%B5%AE%E7%82%B9%E6%95%B0%E8%B5%8B%E5%80%BC\"><\/span>3.15.1 \u6d6e\u70b9\u6570\u8d4b\u503c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6211\u5728\u4f7f\u7528\u67d0\u8f6f\u4ef6\u7ec3\u4e60\u7684\u65f6\u5019\uff0c\u6d6e\u70b9\u6570\u6211\u8d4b\u503c 0 \u7ed9\u6211\u5224\u9519\uff0c\u800c\u7b54\u6848\u662f 0.0\u3002\u5b9e\u9645\u7f16\u8bd1\u5668\u90fd\u4f1a\u8fdb\u884c 0 \u5230 0.0 \u7684\u9690\u5f0f\u8f6c\u6362\uff0c\u6240\u4ee5\u5199 0 \u672c\u8eab\u4e5f\u6ca1\u5565\u95ee\u9898\u3002\u5c31\u662f\u4e0d\u77e5\u9053\u4e8c\u7ea7\u8003\u8bd5\u7684\u65f6\u5019\u80fd\u4e0d\u80fd\u76f4\u63a5\u5199 0\uff0c\u7a33\u59a5\u70b9\u8fd8\u662f\u5199\u6210\u6d6e\u70b9\u6570\u5427\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3152_%E4%BB%A3%E7%A0%81%E7%A9%BA%E6%A0%BC%E6%A0%BC%E5%BC%8F\"><\/span>3.15.2 \u4ee3\u7801\u7a7a\u683c\u683c\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6709\u6b21\u7ec3\u4e60\uff0c\u586b\u7a7a\u9898\u4e2d\u6211\u5199\u7684 s \/ N\uff0c\u7ed9\u6211\u5224\u9519\uff0c\u7b54\u6848\u662f s\/N\uff0c\u6ca1\u9519\u5c31\u662f\u7a7a\u683c\u3002\u4e0d\u6e05\u695a\u8003\u8bd5\u600e\u4e48\u6279\u6539\uff0c\u8fd8\u662f\u5b66\u9898\u76ee\u6324\u4e00\u5768\u7684\u98ce\u683c\u5e94\u8be5\u6bd4\u8f83\u7a33\u59a5\u3002<\/p>\n<h2><span class=\"ez-toc-section\" id=\"316_%E5%B8%A6%E5%8F%82%E5%AE%8F%E5%AE%9A%E4%B9%89\"><\/span>3.16 \u5e26\u53c2\u5b8f\u5b9a\u4e49<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\n#define FUN(x)      x * 9\n\nint main()\n{\n    printf(&quot;%d\\n&quot;, FUN(7 + 1));\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677318802834.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 232px; --smush-placeholder-aspect-ratio: 232\/82;\" \/><\/p>\n<p>\u4e0a\u9762\u7684\u4f8b\u5b50\u6709\u53ef\u80fd\u4f1a\u88ab\u5f53\u4f5c printf(&quot;%d\\n&quot;, 8 * 9) \u6765\u8003\u8651\uff0c\u4f46\u5b8f\u66ff\u6362\u662f\u5728\u7f16\u8bd1\u524d\u7684\u9884\u5904\u7406\u9636\u6bb5\u8fdb\u884c\uff0c\u53ea\u662f\u5355\u7eaf\u7684\u6587\u672c\u66ff\u6362\uff0c\u4e0d\u4f1a\u8ba1\u7b97\u503c\uff0c\u6240\u4ee5\u5b9e\u9645\u662f printf(&quot;%d\\n&quot;, 7 + 1 * 9)<\/p>\n<h2><span class=\"ez-toc-section\" id=\"317_%E8%B5%8B%E5%80%BC%E8%A1%A8%E8%BE%BE%E5%BC%8F%E7%9A%84%E5%8F%96%E5%80%BC\"><\/span>3.17 \u8d4b\u503c\u8868\u8fbe\u5f0f\u7684\u53d6\u503c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 10;\n    printf(&quot;%d\\n&quot;, a = 1);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, a -= 5);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, a += 5);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, a *= 2);\n\n    a = 10;\n    printf(&quot;%d\\n&quot;, a \/= 5);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677379346540.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 208px; --smush-placeholder-aspect-ratio: 208\/147;\" \/><\/p>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint func(int *n)\n{\n    return *n - 5;\n}\n\nint main()\n{\n    int n = 20;\n    while (n = func(&amp;n))\n    {\n        printf(&quot;A %d\\n&quot;, n);\n    }\n\n    n = 20;\n    while ((n = func(&amp;n)) != 5)\n    {\n        printf(&quot;B %d\\n&quot;, n);\n    }\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677379622821.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 192px; --smush-placeholder-aspect-ratio: 192\/159;\" \/><\/p>\n<p>\u53ef\u89c1\u8d4b\u503c\u8bed\u53e5\u7684\u503c\u5c31\u7b49\u4e8e\u8d4b\u503c\u4ee5\u540e\u7684\u503c<\/p>\n<h2><span class=\"ez-toc-section\" id=\"318_%E6%A0%87%E8%AF%86%E7%AC%A6%E5%91%BD%E5%90%8D\"><\/span>3.18 \u6807\u8bc6\u7b26\u547d\u540d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5c31\u662f\u50cf\u53d8\u91cf\u540d\uff0c\u51fd\u6570\u540d\u8fd9\u4e9b\u547d\u540d\uff0c\u5176\u5b9e\u5f88\u591a\u8bed\u8a00\u7684\u89c4\u5219\u90fd\u662f\u8fd9\u4e00\u5957<\/p>\n<p>\u547d\u540d\u53ef\u4ee5\u4f7f\u7528\u5927\u5c0f\u5199\u5b57\u6bcd\uff0c\u6570\u5b57\u548c\u4e0b\u5212\u7ebf\uff0c\u540d\u5b57\u7b2c\u4e00\u4e2a\u5b57\u7b26\u4e0d\u80fd\u7528\u6570\u5b57\uff0c\u4e0d\u80fd\u4f7f\u7528\u8bed\u8a00\u672c\u8eab\u5df2\u7528\u7684\u5173\u952e\u8bcd<\/p>\n<pre><code class=\"language-c\">    \/\/ \u6b63\u786e\u7684\n    int abcd_4242;\n    int _das;\n    int d_dsd;\n    int s89;\n    int a;\n    int _;\n    int For;\n    int IF;\n\n    \/\/ \u9519\u8bef\u7684\n    int 8dad;\n    int 988_f;\n    int 1_;\n    int for;\n    int if;\n    int else;<\/code><\/pre>\n<h2><span class=\"ez-toc-section\" id=\"319_%E4%BA%8C%E7%BB%B4%E6%95%B0%E7%BB%84%E6%8C%87%E9%92%88%E5%B1%82%E9%9D%A2%E7%90%86%E8%A7%A3\"><\/span>3.19 \u4e8c\u7ef4\u6570\u7ec4\u6307\u9488\u5c42\u9762\u7406\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"3191_%E7%90%86%E8%A7%A3\"><\/span>3.19.1 \u7406\u89e3<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a[4][4];\n    int i, j;\n    int count = 0;\n    char *s[] = {&quot;1234&quot;, &quot;abcd&quot;, &quot;09jh&quot;};\n\n    for (i = 0; i &lt; 4; ++i) \/\/ \u521d\u59cb\u5316\u6570\u7ec4\n    {\n        for (j = 0; j &lt; 4; ++j)\n        {\n            a[i][j] = count++;\n        }\n    }\n\n    for (i = 0; i &lt; 4; ++i) \/\/ \u904d\u5386\u6570\u7ec4\n    {\n        for (j = 0; j &lt; 4; ++j)\n        {\n            printf(&quot;%d\\t&quot;, *(*(a + i) + j)); \/\/ a[i][j]\n        }\n        printf(&quot;\\n&quot;);\n    }\n\n    printf(&quot;------------------------------\\n&quot;);\n\n    printf(&quot;%d\\n&quot;, **a); \/\/ a[0][0] = *(*(a + 0) + 0)\n    printf(&quot;%d\\n&quot;, *(*(a + 1) + 3)); \/\/ a[1][3]\n    printf(&quot;%d\\n&quot;, *(*a + 14)); \/\/ 14 \/ 4 = 3......2\uff0c\u5373 a[3][2]\n    printf(&quot;%d\\n&quot;, *(*a + 4 * 3 + 2));\n\n    printf(&quot;------------------------------\\n&quot;);\n\n    for (i = 0; i &lt; 3; ++i)\n    {\n        printf(&quot;%s &quot;, *(s + i)); \/\/ s[i]\n    }\n\n    printf(&quot;\\n------------------------------\\n&quot;);\n\n    printf(&quot;%c\\n&quot;, *(*(s + 1) + 2)); \/\/ s[1][2]: &#039;c\u2019\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677392174949.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 299px; --smush-placeholder-aspect-ratio: 299\/283;\" \/><\/p>\n<p>\u5047\u5982\u6709\u4e00\u4e2a\u6570\u7ec4 a[M][N]\uff0c\u6211\u8981\u53d6 m \u884c n \u5217\u7684\u6570\u636e\uff080 \u2264 m &lt; M, 0 \u2264 n &lt; N\uff09<\/p>\n<ul>\n<li>\u65b9\u6cd5\u4e00\uff1aa[m][n]<\/li>\n<li>\u65b9\u6cd5\u4e8c\uff1a*(*(a + m) + n)<\/li>\n<li>\u65b9\u6cd5\u4e09\uff1a*(*a + N * m + n)<\/li>\n<\/ul>\n<p>\u4e8c\u7ef4\u6570\u7ec4\u5b9e\u9645\u5c31\u662f\u4e2a\u4e8c\u7ea7\u6307\u9488\uff0c\u4e00\u7ea7\u6307\u9488\u4fdd\u5b58\u7684\u662f\u6bcf\u884c\u884c\u9996\u5730\u5740\uff0c\u6bd4\u5982 *a \u5c31\u662f 0 \u884c\u7684\u9996\u4e2a\u5143\u7d20\u7684\u5730\u5740\u3002**a \u5c31\u628a 0 \u884c\u9996\u4e2a\u5143\u7d20\u53d6\u51fa\u6765\uff0c\u5373 a[0][0]<\/p>\n<p>\u5982\u679c\u8981\u53d6 a[m][n]\uff0c\u5219\u5148\u83b7\u53d6\u7b2c m \u884c\u7684\u9996\u5143\u7d20\u5730\u5740 *(a + m)\uff0c\u90a3\u4e48\u7b2c m \u884c\u7b2c n \u5217\u7684\u5730\u5740\u5c31\u662f *(a + m) + n\uff0c\u53d6\u8fd9\u4e2a\u5730\u5740\u7684\u503c\u5c31\u662f *(*(a + m) + n)\uff0c\u5373\u65b9\u6cd5\u4e8c\u7684\u539f\u7406<\/p>\n<p>\u4e8c\u7ef4\u6570\u7ec4\u5206\u914d\u7684\u5185\u5b58\u662f\u8fde\u7eed\u7684\uff0c\u4e5f\u5c31\u662f\u8bf4\u53ea\u8981\u77e5\u9053\u7b2c 0 \u884c\u7b2c 0 \u5217\u7684\u5730\u5740\uff0c\u5c31\u53ef\u4ee5\u901a\u8fc7\u504f\u79fb\u503c\u83b7\u53d6\u6240\u6709\u5143\u7d20\u3002*a \u5c31\u662f\u7b2c 0 \u884c\u9996\u5143\u7d20\u7684\u5730\u5740\uff0c\u90a3\u4e48\u7b2c m \u884c\u7b2c n \u5217\u7684\u5730\u5740\u5c31\u662f *a + \u6570\u7ec4\u5217\u6570N * \u5143\u7d20\u6240\u5728\u884c\u6570m + \u5143\u7d20\u6240\u5728\u5217\u6570n\uff0c\u5373 *a + N * m + n\uff0c\u53d6\u8fd9\u4e2a\u5730\u5740\u7684\u503c\u5c31\u662f *(*a + N * m + n)\uff0c\u5373\u65b9\u6cd5\u4e09\u7684\u539f\u7406<\/p>\n<hr \/>\n<h3><span class=\"ez-toc-section\" id=\"3192_%E4%BC%A0%E5%8F%82\"><\/span>3.19.2 \u4f20\u53c2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nvoid func1(int a[])\n{\n    printf(&quot;\u4e00\u7ef4\u6570\u7ec4\u4f20\u53c2 %u\\n&quot;, sizeof(a));\n}\n\nvoid func2(int a[][4])\n{\n    printf(&quot;\u4e8c\u7ef4\u6570\u7ec4\u4f20\u53c2 %u\\n&quot;, sizeof(a));\n}\n\nint main()\n{\n    int a[4];\n    int b[4][4];\n\n    printf(&quot;\u4e00\u7ef4\u6570\u7ec4 %u\\n&quot;, sizeof(a));\n    func1(a);\n    printf(&quot;\u4e8c\u7ef4\u6570\u7ec4 %u\\n&quot;, sizeof(b));\n    func2(b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677394018891.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 199px; --smush-placeholder-aspect-ratio: 199\/123;\" \/><\/p>\n<p>\u5b9e\u53c2\u6570\u7ec4\u4f20\u7ed9\u51fd\u6570\uff0c\u51fd\u6570\u5185\u90e8\u7684\u5f62\u53c2\u5b9e\u9645\u5c31\u662f\u6307\u9488\u4e86\uff0c\u83b7\u53d6\u5230\u7684\u5927\u5c0f\u4e5f\u662f\u5bf9\u5e94\u7c7b\u578b\u6307\u9488\u7684\u5927\u5c0f\uff0c\u6240\u4ee5\u901a\u5e38\u51fd\u6570\u4f20\u53c2\u8fd8\u8981\u4f20\u5165\u6570\u7ec4\u7684\u5927\u5c0f\u624d\u80fd\u6b63\u5e38\u4f7f\u7528<\/p>\n<h2><span class=\"ez-toc-section\" id=\"320_%E9%9D%99%E6%80%81%E5%8F%98%E9%87%8F%E4%BD%BF%E7%94%A8\"><\/span>3.20 \u9759\u6001\u53d8\u91cf\u4f7f\u7528<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint func(int x)\n{\n    static int a = 0;\n    a += x;\n    return a;\n}\n\nint main()\n{\n    int b = func(3) + func(5);\n    printf(&quot;%d\\n&quot;, b);\n\n    b = func(9);\n    printf(&quot;%d\\n&quot;, b);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677395915016.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 218px; --smush-placeholder-aspect-ratio: 218\/91;\" \/><\/p>\n<p>\u9759\u6001\u53d8\u91cf\u5185\u5b58\u5206\u914d\u5728\u5168\u5c40\u533a\uff0c\u548c\u5168\u5c40\u53d8\u91cf\u4e00\u6837\uff0c\u5982\u679c\u4e0d\u521d\u59cb\u5316\uff0c\u4e5f\u4f1a\u9ed8\u8ba4\u521d\u59cb\u5316\u4e3a 0\u3002\u4e0a\u9762\u4f8b\u5b50\u4e2d\u7684\u5168\u5c40\u53d8\u91cf\u5728\u9996\u6b21\u4f7f\u7528\u65f6\u88ab\u521d\u59cb\u5316\u4e3a\u96f6\uff0c\u5728 func \u51fd\u6570\u8fd0\u884c\u7ed3\u675f\u540e\u5185\u5b58\u4e5f\u4e0d\u4f1a\u88ab\u91ca\u653e\uff0c\u4e0b\u6b21\u8c03\u7528 func \u51fd\u6570\uff0c\u9759\u6001\u53d8\u91cf\u4e0d\u4f1a\u518d\u8d4b\u503c\u4e3a 0\uff0c\u800c\u662f\u7ee7\u7eed\u4f7f\u7528\u4e0a\u4e00\u6b21\u6267\u884c\u7ed3\u675f\u540e\u7684\u503c<\/p>\n<h2><span class=\"ez-toc-section\" id=\"321_%E8%BF%9E%E7%BB%AD%E8%B5%8B%E5%80%BC\"><\/span>3.21 \u8fde\u7eed\u8d4b\u503c<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">#include &lt;stdio.h&gt;\n\nint main()\n{\n    int a = 1;\n    int b = 2;\n    int c = 3;\n    int d = 4;\n\n    a = b = c = d = 5;\n    printf(&quot;%d %d %d %d\\n&quot;, a, b, c, d);\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677396411118.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 275px; --smush-placeholder-aspect-ratio: 275\/115;\" \/><\/p>\n<p>\u8fde\u7eed\u8d4b\u503c\u4ece\u53f3\u5f80\u5de6\u8fdb\u884c<\/p>\n<h2><span class=\"ez-toc-section\" id=\"322_%E6%96%87%E4%BB%B6%E8%AF%BB%E5%86%99\"><\/span>3.22 \u6587\u4ef6\u8bfb\u5199<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"3221_fopen_%E6%A8%A1%E5%BC%8F\"><\/span>3.22.1 fopen \u6a21\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>r<br \/>\n\u4ee5\u53ea\u8bfb\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u8be5\u6587\u4ef6\u5fc5\u987b\u5b58\u5728\u3002<br \/>\nr+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u8be5\u6587\u4ef6\u5fc5\u987b\u5b58\u5728\u3002<br \/>\nrb+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u53ea\u5141\u8bb8\u8bfb\/\u5199\u6570\u636e\u3002<br \/>\nrt+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\uff0c\u5141\u8bb8\u8bfb\u548c\u5199\u3002<br \/>\nw<br \/>\n\u6253\u5f00\u53ea\u5199\u6587\u4ef6\uff0c\u82e5\u6587\u4ef6\u5b58\u5728\u5219\u6587\u4ef6\u957f\u5ea6\u6e05\u4e3a\u96f6\uff0c\u5373\u8be5\u6587\u4ef6\u5185\u5bb9\u4f1a\u6d88\u5931\uff1b\u82e5\u6587\u4ef6\u4e0d\u5b58\u5728\u5219\u521b\u5efa\u8be5\u6587\u4ef6\u3002<br \/>\nw+<br \/>\n\u6253\u5f00\u53ef\u8bfb\/\u5199\u6587\u4ef6\uff0c\u82e5\u6587\u4ef6\u5b58\u5728\u5219\u6587\u4ef6\u957f\u5ea6\u6e05\u4e3a\u96f6\uff0c\u5373\u8be5\u6587\u4ef6\u5185\u5bb9\u4f1a\u6d88\u5931\uff1b\u82e5\u6587\u4ef6\u4e0d\u5b58\u5728\u5219\u521b\u5efa\u8be5\u6587\u4ef6\u3002<br \/>\na<br \/>\n\u4ee5\u9644\u52a0\u7684\u65b9\u5f0f\u6253\u5f00\u53ea\u5199\u6587\u4ef6\u3002\u82e5\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u5219\u4f1a\u521b\u5efa\u8be5\u6587\u4ef6\uff1b\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u5219\u5199\u5165\u7684\u6570\u636e\u4f1a\u88ab\u52a0\u5230\u6587\u4ef6\u5c3e\u540e\uff0c\u5373\u6587\u4ef6\u539f\u5148\u7684\u5185\u5bb9\u4f1a\u88ab\u4fdd\u7559\uff08EOF \u7b26\u4fdd\u7559\uff09\u3002<br \/>\na+<br \/>\n\u4ee5\u9644\u52a0\u65b9\u5f0f\u6253\u5f00\u53ef\u8bfb\/\u5199\u7684\u6587\u4ef6\u3002\u82e5\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u5219\u4f1a\u521b\u5efa\u8be5\u6587\u4ef6\uff0c\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u5219\u5199\u5165\u7684\u6570\u636e\u4f1a\u88ab\u52a0\u5230\u6587\u4ef6\u5c3e\u540e\uff0c\u5373\u6587\u4ef6\u539f\u5148\u7684\u5185\u5bb9\u4f1a\u88ab\u4fdd\u7559\uff08EOF\u7b26\u4e0d\u4fdd\u7559\uff09\u3002<br \/>\nwb<br \/>\n\u4ee5\u53ea\u5199\u65b9\u5f0f\u6253\u5f00\u6216\u65b0\u5efa\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u53ea\u5141\u8bb8\u5199\u6570\u636e\u3002<br \/>\nwb+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u6216\u65b0\u5efa\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5141\u8bb8\u8bfb\u548c\u5199\u3002<br \/>\nwt+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u6216\u65b0\u5efa\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\uff0c\u5141\u8bb8\u8bfb\u548c\u5199\u3002<br \/>\nat+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u6587\u672c\u6587\u4ef6\uff0c\u5141\u8bb8\u8bfb\u6216\u5728\u6587\u672c\u672b\u8ffd\u52a0\u6570\u636e\u3002<br \/>\nab+<br \/>\n\u4ee5\u8bfb\/\u5199\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u4e8c\u8fdb\u5236\u6587\u4ef6\uff0c\u5141\u8bb8\u8bfb\u6216\u5728\u6587\u4ef6\u672b\u8ffd\u52a0\u6570\u636e\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3222_%E5%AE%9E%E4%BE%8B\"><\/span>3.22.2 \u5b9e\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<pre><code class=\"language-c\">\/\/ \u5fae\u8f6f\u641e\u4e9b\u83ab\u540d\u5176\u5999\u7684\u5b89\u5168\u51fd\u6570\u771f\u7684\u65e0\u8bed\n\/\/ \u6807\u51c6\u5e93\u51fd\u6570\u6b63\u786e\u4f7f\u7528\u4e5f\u662f\u5b89\u5168\u7684\n\/\/ \u5b89\u5168\u51fd\u6570\u6ca1\u6709\u6b63\u786e\u4f7f\u7528\u4e5f\u6ca1\u7528\n#define _CRT_SECURE_NO_WARNINGS \/\/ \u5173\u95ed\u4e0d\u4f7f\u7528\u5b89\u5168\u51fd\u6570\u7684\u8b66\u544a\n#include &lt;stdio.h&gt;\n#include &lt;stdlib.h&gt; \/\/ exit\n#include &lt;string.h&gt; \/\/ memset\n\n#define TEXT_FILE   &quot;text.txt&quot;\n#define BIN_FILE    &quot;bin.txt&quot;\n\n\/\/ \u521b\u5efa\u6587\u672c\u6587\u4ef6\u3001\u5199\u5165\u6570\u636e\nvoid func1()\n{\n    FILE *fp = fopen(TEXT_FILE, &quot;w&quot;);\n    if (!fp)\n    {\n        perror(&quot;func1 \u6587\u4ef6\u6253\u5f00\u5931\u8d25\uff01\\n&quot;);\n        exit(1);\n    }\n    if (fputc(&#039;A&#039;, fp) == EOF) \/\/ \u5199\u5165\u5b57\u7b26\n    {\n        perror(&quot;func1 \u5199\u5165\u5b57\u7b26\u5931\u8d25\uff01\\n&quot;);\n        exit(1);\n    }\n    fputs(&quot;\\n123abc\\n&quot;, fp); \/\/ \u5199\u5165\u5b57\u7b26\u4e32\n    fprintf(fp, &quot;%s %d&quot;, &quot;hello&quot;, 10); \/\/ \u683c\u5f0f\u5316\u5199\u5165\n    fclose(fp); \/\/ \u5173\u95ed\u6587\u4ef6\n}\n\n\/\/ \u8bfb\u53d6\u6587\u672c\u6587\u4ef6\nvoid func2()\n{\n    char s1[32], s2[32];\n    int i = 0;\n\n    FILE *fp = fopen(TEXT_FILE, &quot;r&quot;);\n    if (!fp)\n    {\n        perror(&quot;func2 \u6587\u4ef6\u6253\u5f00\u5931\u8d25\uff01\\n&quot;);\n        exit(2);\n    }\n\n    putchar(fgetc(fp)); \/\/ \u8bfb\u53d6\u4e00\u4e2a\u5b57\u7b26\n    putchar(fgetc(fp)); \/\/ \u8bfb\u53d6\u672b\u5c3e\u7684\u6362\u884c\u7b26\n\n    memset(s1, 0, sizeof(s1)); \/\/ \u521d\u59cb\u5316\u5b57\u7b26\u4e32\u6570\u7ec4\n    fgets(s1, sizeof(s1), fp); \/\/ \u8bfb\u53d6\u5b57\u7b26\u4e32\n    printf(&quot;%s&quot;, s1);\n\n    memset(s2, 0, sizeof(s2));\n    fscanf(fp, &quot;%s %d&quot;, s2, &amp;i); \/\/ \u683c\u5f0f\u5316\u8bfb\u53d6\n    printf(&quot;%s %d\\n&quot;, s2, i);\n\n    fclose(fp);\n}\n\ntypedef struct\n{\n    char name[12];\n    int age;\n} person;\n\n\/\/ \u521b\u5efa\u6587\u4ef6\u3001\u5199\u5165\u4e8c\u8fdb\u5236\u6570\u636e\nvoid func3()\n{\n    person p1[3] = \n    {\n        {&quot;\u5c0f\u660e&quot;, 20},\n        {&quot;\u5c0f\u5f3a&quot;, 18},\n        {&quot;\u5c0f\u7ea2&quot;, 19}\n    };\n\n    FILE *fp = fopen(BIN_FILE, &quot;wb&quot;);\n    if (!fp)\n    {\n        perror(&quot;func3 \u6253\u5f00\u6587\u4ef6\u5931\u8d25\uff01\\n&quot;);\n        exit(3);\n    }\n\n    fwrite(p1,\n        sizeof(person), \/\/ \u5355\u4e2a\u7ed3\u6784\u4f53\u7684\u5927\u5c0f\n        3, \/\/ \u7ed3\u6784\u4f53\u5b9e\u4f8b\u4e2a\u6570\n        fp);\n    fclose(fp);\n}\n\n\/\/ \u8bfb\u53d6\u4e8c\u8fdb\u5236\u6570\u636e\nvoid func4()\n{\n    int i;\n    person p2[3] = {0};\n\n    FILE *fp = fopen(BIN_FILE, &quot;rb&quot;);\n    if (!fp)\n    {\n        perror(&quot;func3 \u6253\u5f00\u6587\u4ef6\u5931\u8d25\uff01\\n&quot;);\n        exit(4);\n    }\n\n    fread(p2, sizeof(person), 3, fp);\n    for (i = 0; i &lt; 3; ++i)\n    {\n        printf(&quot;%s %d\\n&quot;, p2[i].name, p2[i].age);\n    }\n    fclose(fp);\n}\n\nint main()\n{\n    func1();\n    func2();\n    func3();\n    func4();\n\n    return 0;\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/02\/image-1677486764024.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 254px; --smush-placeholder-aspect-ratio: 254\/157;\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"323_%E7%BB%93%E6%9E%84%E4%BD%93%E5%AE%9A%E4%B9%89%E5%8F%8A%E5%AE%9E%E4%BE%8B%E5%8C%96\"><\/span>3.23 \u7ed3\u6784\u4f53\u5b9a\u4e49\u53ca\u5b9e\u4f8b\u5316<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<pre><code class=\"language-c\">\/\/ 1\nstruct A \/\/ \u5b9a\u4e49\u7ed3\u6784\u4f53 A\n{\n    int a;\n    int b;\n};\nstruct A a; \/\/ \u5b9a\u4e49\u4e00\u4e2a\u5b9e\u4f8b a\n\n\/\/ 2\nstruct B \/\/ \u5b9a\u4e49\u7ed3\u6784\u4f53 B \u7684\u540c\u65f6\uff0c\u5b9a\u4e49\u4e86\u5b9e\u4f8b b1, b2\n{\n    int a;\n    int b;\n} b1, b2;\nstruct B b3;\n\n\/\/ 3\nstruct \/\/ \u5b9a\u4e49\u4e86\u4e24\u4e2a\u5b9e\u4f8b c1, c2\uff0c\u7ed3\u6784\u4f53\u6ca1\u540d\u5b57\u540e\u7eed\u4e0d\u80fd\u518d\u5b9a\u4e49\u5b9e\u4f8b\n{\n    int a;\n    int b;\n} c1, c2;\n\n\/\/ 4\ntypedef struct \/\/ \u5b9a\u4e49\u7ed3\u6784\u4f53\uff0c\u5e76\u4e3a\u7ed3\u6784\u4f53\u53d6\u522b\u540d\u4e3a D\n{\n    int a;\n    int b;\n} D;\nD d1, d2; \/\/ \u5b9a\u4e49\u5b9e\u4f8b d1, d2\n\n\/\/ 5\ntypedef struct E \/\/ \u5b9a\u4e49\u7ed3\u6784\u4f53 E\uff0c\u5e76\u4e3a struct E \u53d6\u522b\u540d\u4e3a E\n{\n    int a;\n    int b;\n} E;\nstruct E e1; \/\/ \u901a\u8fc7\u7ed3\u6784\u4f53\u540d\u5b57\u5b9a\u4e49\u5b9e\u4f8b\nE e2; \/\/ \u901a\u8fc7\u522b\u540d\u5b9a\u4e49\u5b9e\u4f8b<\/code><\/pre>\n<p>C \u8bed\u8a00\u4e2d\u5982\u679c\u4e0d\u53d6\u522b\u540d\uff0c\u5b9a\u4e49\u7ed3\u6784\u4f53\u5b9e\u4f8b\u65f6\u5fc5\u987b\u52a0\u4e0a\u5173\u952e\u8bcd struct\uff0c\u5373 <strong>struct \u7ed3\u6784\u4f53\u540d \u5b9e\u4f8b\u540d<\/strong><br \/>\n\u53d6\u522b\u540d\u53ef\u4ee5\u5c06 <strong>struct {}<\/strong> \u6216\u8005 <strong>struct \u7ed3\u6784\u4f53\u540d {}<\/strong> \u6574\u4f53\u8bbe\u4e3a\u4e00\u4e2a\u540d\u5b57\u4f7f\u7528<\/p>\n<p>\u8865\u5145\uff1aC++ \u4e2d\u7684 struct \u548c C \u4e2d\u7684\u4e0d\u540c\uff0cC++ \u4e2d\u7684 struct \u672c\u8d28\u4e0a\u662f\u4e00\u4e2a\u7c7b\uff0c\u53ea\u662f\u9ed8\u8ba4\u6743\u9650\u4e3a public\uff08\u516c\u5f00\uff09\uff0c\u800c class \u7684\u9ed8\u8ba4\u6743\u9650\u4e3a private\uff08\u79c1\u6709\uff09\u3002C++ \u4e2d\u5b9a\u4e49\u7ed3\u6784\u4f53\u5b9e\u4f8b\u65f6\u4e0d\u9700\u8981\u52a0\u4e0a struct \u5173\u952e\u8bcd\uff0c\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u7ed3\u6784\u4f53\u540d\u5b9a\u4e49\u5b9e\u4f8b\uff0c\u5373 <strong>\u7ed3\u6784\u4f53\u540d \u5b9e\u4f8b\u540d<\/strong><\/p>\n<h1><span class=\"ez-toc-section\" id=\"4_%E5%B8%B8%E8%A7%81%E7%AE%97%E6%B3%95%E6%97%B6%E9%97%B4%E5%A4%8D%E6%9D%82%E5%BA%A6\"><\/span>4 \u5e38\u89c1\u7b97\u6cd5\u65f6\u95f4\u590d\u6742\u5ea6<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<ul>\n<li>\u7ebf\u6027\u641c\u7d22\uff08Linear Search\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n)<\/li>\n<li>\u4e8c\u5206\u67e5\u627e\uff08Binary Search\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(log n)\uff0c\u5143\u7d20\u5fc5\u987b\u5df2\u6392\u5e8f<\/li>\n<li>\u5192\u6ce1\u6392\u5e8f\uff08Bubble Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n^2)<\/li>\n<li>\u63d2\u5165\u6392\u5e8f\uff08Insertion Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n^2)<\/li>\n<li>\u5feb\u901f\u6392\u5e8f\uff08Quick Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n log n)<\/li>\n<li>\u5f52\u5e76\u6392\u5e8f\uff08Merge Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n log n)<\/li>\n<li>\u5806\u6392\u5e8f\uff08Heap Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n log n)<\/li>\n<li>\u9009\u62e9\u6392\u5e8f\uff08Selection Sort\uff09\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n^2)<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>2023.5.14 \u67e5\u5230\u6210\u7ee9\u4e86\uff0c\u4e00\u628a\u8fc7\uff0c\u5206\u6570\u4e3a\u826f\u597d\uff0c\u4e5f\u5c31\u662f\u516b\u5341\u51e0\u5206\u3002\u81ea\u8ba4\u4e3a\u7684\u8bdd\u64cd\u4f5c\u9898\u768460\u5206\u6211\u662f\u62ff\u6ee1\u4e86\uff0c\u6263\u5206\u5e94 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"zakra_page_container_layout":"customizer","zakra_page_sidebar_layout":"customizer","zakra_remove_content_margin":false,"zakra_sidebar":"customizer","zakra_transparent_header":"customizer","zakra_logo":0,"zakra_main_header_style":"default","zakra_menu_item_color":"","zakra_menu_item_hover_color":"","zakra_menu_item_active_color":"","zakra_menu_active_style":"","zakra_page_header":true,"_lmt_disableupdate":"no","_lmt_disable":"no","footnotes":""},"categories":[1,589],"tags":[962,968,969,964,974,976,977,980,967,975,978,966,965,979,963,970,961,971,972,973],"class_list":["post-9266","post","type-post","status-publish","format-standard","hentry","category-all","category-c-c","tag-c","tag-if","tag-switch","tag-vc2010","tag-974","tag-976","tag-977","tag-980","tag-967","tag-975","tag-978","tag-966","tag-965","tag-979","tag-963","tag-970","tag-961","tag-971","tag-972","tag-973"],"modified_by":"IYATT-yx","_links":{"self":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/9266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9266"}],"version-history":[{"count":3,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/9266\/revisions"}],"predecessor-version":[{"id":21520,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/9266\/revisions\/21520"}],"wp:attachment":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}