{"id":9540,"date":"2023-03-10T12:02:00","date_gmt":"2023-03-10T04:02:00","guid":{"rendered":"https:\/\/blog.iyatt.com\/?p=9540"},"modified":"2024-05-05T14:18:11","modified_gmt":"2024-05-05T06:18:11","slug":"c-%e5%8d%95%e4%be%8b%e6%a8%a1%e5%bc%8f","status":"publish","type":"post","link":"https:\/\/blog.iyatt.com\/?p=9540","title":{"rendered":"C++ \u5355\u4f8b\u6a21\u5f0f"},"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-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/blog.iyatt.com\/?p=9540\/#%E7%8E%AF%E5%A2%83\" >\u73af\u5883<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/blog.iyatt.com\/?p=9540\/#%E5%8D%95%E4%BE%8B%E6%A8%A1%E5%BC%8F\" >\u5355\u4f8b\u6a21\u5f0f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/blog.iyatt.com\/?p=9540\/#%E6%A8%A1%E6%9D%BF\" >\u6a21\u677f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/blog.iyatt.com\/?p=9540\/#%E7%A4%BA%E4%BE%8B\" >\u793a\u4f8b<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%E7%8E%AF%E5%A2%83\"><\/span>\u73af\u5883<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Debian 11\uff08arm64\uff09<\/p>\n<p>\u7f16\u8bd1\u5668 g++ 10.2.1\uff1b\u7f16\u8bd1\u6807\u51c6 C++20\uff1b\u53c2\u6570\uff1a-std=c++20 -no-pie -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Werror=format-security -Wextra -pedantic -Wimplicit-fallthrough -Wsequence-point -Wswitch-unreachable -Wswitch-enum -Wstringop-truncation -Wbool-compare -Wtautological-compare -Wfloat-equal -Wshadow=global -Wpointer-arith -Wpointer-compare -Wcast-align -Wcast-qual -Wwrite-strings -Wdangling-else -Wlogical-op -Wconversion -g -O0<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E5%8D%95%E4%BE%8B%E6%A8%A1%E5%BC%8F\"><\/span>\u5355\u4f8b\u6a21\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"%E6%A8%A1%E6%9D%BF\"><\/span>\u6a21\u677f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5728\u8fd9\u79cd\u8bbe\u8ba1\u6a21\u5f0f\u4e0b\uff0c\u4e00\u4e2a\u7c7b\u53ea\u6709\u4e00\u4e2a\u5b9e\u4f8b\u3002\u4e00\u822c\u7684\u5b9e\u73b0\u65b9\u6cd5\u662f\u5c06\u6784\u9020\u51fd\u6570\u548c\u6790\u6784\u51fd\u6570\u8bbe\u7f6e\u4e3a\u79c1\u6709\uff0c\u540c\u65f6\u7981\u7528\u62f7\u8d1d\u548c\u8d4b\u503c\u3002\u7c7b\u4e2d\u5b9a\u4e49\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\u7528\u4e8e\u50a8\u5b58\u7c7b\u7684\u5b9e\u4f8b\uff0c\u5b83\u5c06\u4e0d\u4f9d\u8d56\u4e8e\u5177\u4f53\u5bf9\u8c61\uff0c\u9759\u6001\u53d8\u91cf\u53ea\u521d\u59cb\u5316\u4e00\u6b21\uff0c\u5c06\u4f5c\u4e3a\u552f\u4e00\u7684\u5b9e\u4f8b\uff0c\u53e6\u5916\u5b9a\u4e49\u4e00\u4e2a\u9759\u6001\u6210\u5458\u51fd\u6570\u7528\u4e8e\u83b7\u53d6\u8fd9\u4e2a\u5b9e\u4f8b\u3002<\/p>\n<pre><code class=\"language-cpp\">class Singleton\n{\n    public:\n        static Singleton &amp;getInstance()\n        {\n            static Singleton instance;\n            return instance;\n        }\n\n    private:\n        \/\/ \u7981\u6b62\u62f7\u8d1d\u548c\u8d4b\u503c\n        Singleton(const Singleton &amp;) = delete;\n        Singleton &amp;operator=(const Singleton &amp;) = delete;\n\n        Singleton() {} \/\/ \u6784\u9020\u51fd\u6570\n        ~Singleton() {} \/\/ \u6790\u6784\u51fd\u6570\n};<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"%E7%A4%BA%E4%BE%8B\"><\/span>\u793a\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5148\u83b7\u53d6\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u5bf9\u5b83\u5b58\u5165\u4fe1\u606f\uff0c\u518d\u83b7\u53d6\u4e00\u4e2a\u5b9e\u4f8b\uff0c\u53d6\u51fa\u6765\u7684\u4fe1\u606f\u4f9d\u7136\u662f\u7b2c\u4e00\u6b21\u83b7\u53d6\u7684\u5b9e\u4f8b\u5b58\u5165\u7684\u4fe1\u606f<\/p>\n<pre><code class=\"language-cpp\">#include &lt;iostream&gt;\n\nclass Singleton\n{\n    public:\n        static Singleton &amp;getInstance()\n        {\n            static Singleton instance;\n            return instance;\n        }\n\n        void set(std::string name, int age)\n        {\n            m_name = name;\n            m_age = age;\n        }\n\n        void print()\n        {\n            std::cout &lt;&lt; m_name &lt;&lt; &quot; &quot; &lt;&lt; m_age &lt;&lt; std::endl;\n        }\n\n    private:\n        Singleton(const Singleton &amp;) = delete;\n        Singleton &amp;operator=(const Singleton &amp;) = delete;\n\n        Singleton() {}\n        ~Singleton() {}\n\n        std::string m_name;\n        int m_age;\n};\n\nint main()\n{\n    Singleton &amp;s1 = Singleton::getInstance();\n    s1.set(&quot;\u5c0f\u660e&quot;, 20);\n\n    Singleton &amp;s2 = Singleton::getInstance();\n    s2.print();\n}<\/code><\/pre>\n<p><img decoding=\"async\" data-src=\"https:\/\/blog.iyatt.com\/wp-content\/uploads\/2023\/03\/image-1678420779404.png\" alt=\"file\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" class=\"lazyload\" style=\"--smush-placeholder-width: 146px; --smush-placeholder-aspect-ratio: 146\/86;\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u73af\u5883 Debian 11\uff08arm64\uff09 \u7f16\u8bd1\u5668 g++ 10.2.1\uff1b\u7f16\u8bd1\u6807\u51c6 C++20\uff1b\u53c2\u6570\uff1a-std=c [&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],"tags":[],"class_list":["post-9540","post","type-post","status-publish","format-standard","hentry","category-all"],"modified_by":"IYATT-yx","_links":{"self":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/9540","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=9540"}],"version-history":[{"count":0,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=\/wp\/v2\/posts\/9540\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9540"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9540"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iyatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9540"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}