{"id":163,"date":"2024-12-15T21:30:38","date_gmt":"2024-12-15T13:30:38","guid":{"rendered":"http:\/\/yangnanbei.top\/?p=163"},"modified":"2025-08-31T21:06:53","modified_gmt":"2025-08-31T13:06:53","slug":"lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e4%b8%80%e5%88%87","status":"publish","type":"post","link":"http:\/\/yangnanbei.top\/index.php\/2024\/12\/15\/lambda%e8%a1%a8%e8%be%be%e5%bc%8f%e7%9a%84%e4%b8%80%e5%88%87\/","title":{"rendered":"lambda\u8868\u8fbe\u5f0f\u7684\u4e00\u5207"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u524d\u8a00<\/h2>\n\n\n\n<ol start=\"1\" class=\"wp-block-list\">\n<li>lambda\u8868\u8fbe\u5f0f\u65f6C++11\u65f6\u5f15\u5165\u7684\u7279\u6027<\/li>\n\n\n\n<li>lambda\u53c8\u79f0\u533f\u540d\u51fd\u6570<\/li>\n\n\n\n<li><strong>lambda\u672c\u8d28\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\uff0c\u533f\u540d\u7684\u7c7b\u7c7b\u578b<\/strong>\u3002\u5b83\u662f\u4e00\u4e2a\u5e26\u6709operator()\u7684\u7c7b\uff0c\u5373\u4eff\u51fd\u6570\u3002\n<ul class=\"wp-block-list\">\n<li>\u4eff\u51fd\u6570(functor), \u5c31\u662f\u4f7f\u5f97\u4e00\u4e2a\u7c7b\u7684\u4f7f\u7528\u770b\u4e0a\u53bb\u50cf\u4e00\u4e2a\u51fd\u6570\u3002\u5176\u5b9e\u73b0\u4e3a\u7c7b\u4e2d\u5b9e\u73b0\u4e00\u4e2aoperator(), \u8fd9\u4e2a\u7c7b\u5c31\u6709\u4e86\u7c7b\u4f3c\u51fd\u6570\u7684\u884c\u4e3a\uff0c\u5373\u4e3a\u4e00\u4e2a\u4eff\u51fd\u6570\u7c7b\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">lambda\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u7528\u6cd5<\/h2>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><strong>[capture] (params) -&gt; ret {body;};<\/strong><\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>capture \u6355\u83b7\u5217\u8868<\/li>\n\n\n\n<li>params \u53c2\u6570\u8868<\/li>\n\n\n\n<li>ret \u8fd4\u56de\u503c\u7c7b\u578b<\/li>\n\n\n\n<li>body \u51fd\u6570\u4f53<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">\u6355\u83b7\u5217\u8868<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>[]: \u8868\u793a\u4e0d\u6355\u83b7\u4efb\u4f55\u53d8\u91cf<\/li>\n\n\n\n<li>[=]: \u8868\u793a\u6309\u503c\u6355\u83b7\u53d8\u91cf<\/li>\n\n\n\n<li>[&amp;]: \u8868\u793a\u6309\u5f15\u7528\u6355\u83b7\u53d8\u91cf<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u4f7f\u7528\u573a\u666f<\/h2>\n\n\n\n<p>\u51fd\u6570\u4f53\u6bd4\u8f83\u7b80\u5355\uff0c\u7531\u4e8e\u4f5c\u7528\u57df\u6709\u9650\uff0c\u6700\u597d\u662f\u4e0d\u5728\u522b\u7684\u5730\u65b9\u8c03\u7528\uff0c\u8fd9\u79cd\u573a\u666f\u4e0b\u4f7f\u7528lambda\u53ef\u4ee5\u7701\u53bb\u51fd\u6570\u7684\u58f0\u660e\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9e\u9a8c01 overload() to implement lambda<\/h2>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#d8dee9ff;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"\u590d\u5236\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>#include &lt;iostream>\nclass AddNum {\n    public:\n        AddNum(int num): num_(num) {};\n\n        \/\/ int addNum(int x) const {\n        \/\/     return num_ + x;\n        \/\/ }\n\n        int operator()(int x) const {\n            return num_ + x;\n        }\n    private:\n        int num_;\n};\n\nint main()\n{\n    \/* functor *\/\n    auto add_num = AddNum(10);\n    \/* auto x = add_num.addNum(5); *\/\n    auto x = add_num(5);\n    std::cout &lt;&lt; \"x: \" &lt;&lt; x &lt;&lt; std::endl;\n\n    \/* lambda [] \u4e2d\u662f lambda\u7684\u6355\u83b7\u5217\u8868 *\/\n    \/* lambda_num\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u4ec5\u9650\u4e8elambda\u8868\u8fbe\u5f0f *\/\n    auto add_num2 = &#91;lambda_num = 10&#93;(int x) {\n        return lambda_num + x;\n    };\n    auto lambda_x = add_num2(5);\n    std::cout &lt;&lt; \"lambda_x: \" &lt;&lt; lambda_x &lt;&lt; std::endl;\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">iostream<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">AddNum<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">public<\/span><span style=\"color: #ECEFF4\">:<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #88C0D0\">AddNum<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">num<\/span><span style=\"color: #ECEFF4\">):<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">num_<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">num<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{}<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">        \/\/ int addNum(int x) const {<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">        \/\/     return num_ + x;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">        \/\/ }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">operator<\/span><span style=\"color: #D8DEE9FF\">()<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">const<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> num_ <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> x<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #ECEFF4\">:<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> num_<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* functor *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">auto<\/span><span style=\"color: #D8DEE9FF\"> add_num <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">AddNum<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* auto x = add_num.addNum(5); *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">auto<\/span><span style=\"color: #D8DEE9FF\"> x <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">add_num<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #B48EAD\">5<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">x: <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> x <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* lambda [] \u4e2d\u662f lambda\u7684\u6355\u83b7\u5217\u8868 *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* lambda_num\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u4ec5\u9650\u4e8elambda\u8868\u8fbe\u5f0f *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">auto<\/span><span style=\"color: #D8DEE9FF\"> add_num2 <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&#91;<\/span><span style=\"color: #D8DEE9\">lambda_num<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #ECEFF4\">&#93;(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> lambda_num <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> x<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">auto<\/span><span style=\"color: #D8DEE9FF\"> lambda_x <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">add_num2<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #B48EAD\">5<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">lambda_x: <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> lambda_x <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u7f16\u8bd1\u5e76\u8fd0\u884c\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>g++ lambda_01.cpp -std=c++17 &amp;&amp; .\/a.out<\/p>\n\n\n\n<p>x: 15<\/p>\n\n\n\n<p>lambda_x: 15<\/p>\n<\/blockquote>\n\n\n\n<p>\u53ef\u4ee5\u770b\u5230\u4e0b\u65b9\u7684lambda\u8868\u8fbe\u5f0f\u6240\u5b9e\u73b0\u7684\u6548\u679c\u4e0eAddNum\u7c7b\u91cd\u8f7d()\u8fd0\u7b97\u7b26\u540e\u7684\u6548\u679c\u76f8\u540c\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9e\u9a8c02 store lambda to func<\/h2>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#d8dee9ff;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"\u590d\u5236\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>#include &lt;iostream>\n\nint main() {\n    \/* example 1 *\/\n    int res = [](int x)->int {\n        return ++x;\n    }(3);\n\n    std::cout &lt;&lt; \"res: \" &lt;&lt; res &lt;&lt; std::endl;\n\n    \/* example 2, store it to func *\/\n    \/* we can use auto replace std::function *\/\n    \/* old: std::function&lt;int(int)> func = [](int x)->int { *\/\n    \/* we can del retuen type int *\/\n    \/* old: auto func = [](int x)->int { *\/\n    auto func = [](int x) {\n        return ++x;\n    };\n    std::cout&lt;&lt;\"i:\";\n    for (int i = 0; i &lt; 10; i++) {\n        std::cout &lt;&lt; \" \" &lt;&lt; func(i);\n    }\n    std::cout&lt;&lt;std::endl;\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">iostream<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* example 1 *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> res <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">[](<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">)-&gt;<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #D8DEE9FF\">x<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}(<\/span><span style=\"color: #B48EAD\">3<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">res: <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> res <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* example 2, store it to func *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* we can use auto replace std::function *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* old: std::function&lt;int(int)&gt; func = [](int x)-&gt;int { *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* we can del retuen type int *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* old: auto func = [](int x)-&gt;int { *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">auto<\/span><span style=\"color: #D8DEE9FF\"> func <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">[](<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #D8DEE9FF\">x<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout<\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">i:<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">func<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">i<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout<\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\">std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u7f16\u8bd1\u8fd0\u884c\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>g++ lambda_02.cpp -std=c++17 &amp;&amp; .\/a.out<\/p>\n\n\n\n<p>res: 4<\/p>\n\n\n\n<p>i: 1 2 3 4 5 6 7 8 9 10<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9e\u9a8c03 \u548cfor_each\u6a21\u677f\u76f8\u7ed3\u5408\uff0c\u6355\u83b7<\/h2>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro cbp-has-line-numbers\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;--cbp-line-number-color:#d8dee9ff;--cbp-line-number-width:calc(2 * 0.6 * .875rem);line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" style=\"color:#d8dee9ff;display:none\" aria-label=\"\u590d\u5236\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>#include &lt;iostream>\n#include &lt;algorithm>\n#include &lt;vector>\n\nint main() {\n    std::vector&lt;int> vec = {1, 2, 3, 4, 5, 6};\n    int multiplier = 2;\n    \/* \u6309\u503c\u6355\u83b7 eg1 *\/\n    std::for_each(vec.begin(), vec.end(), &#91;multiplier&#93;(int x){\n        std::cout &lt;&lt; x * multiplier &lt;&lt; \" \";\n    });\n    std::cout &lt;&lt; std::endl;\n    \/* \u6309\u503c\u6355\u83b7 eg2 use = instead*\/\n    std::for_each(vec.begin(), vec.end(), &#91;=&#93;(int x){\n        std::cout &lt;&lt; x * multiplier &lt;&lt; \" \";\n    });\n    std::cout &lt;&lt; std::endl;\n    \/* \u6309\u5f15\u7528\u6355\u83b7 *\/\n    std::for_each(vec.begin(), vec.end(), &#91;&amp;&#93;(int x){\n        multiplier++;\n        std::cout &lt;&lt; x * multiplier &lt;&lt; \" \";\n    });\n    std::cout &lt;&lt; std::endl;\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">iostream<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">algorithm<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">vector<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">vector<\/span><span style=\"color: #81A1C1\">&lt;int&gt;<\/span><span style=\"color: #D8DEE9FF\"> vec <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">2<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">3<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">4<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">5<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">6<\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> multiplier <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">2<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* \u6309\u503c\u6355\u83b7 eg1 *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #88C0D0\">for_each<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">begin<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">end<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&#91;<\/span><span style=\"color: #D8DEE9\">multiplier<\/span><span style=\"color: #ECEFF4\">&#93;(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">){<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> x <\/span><span style=\"color: #81A1C1\">*<\/span><span style=\"color: #D8DEE9FF\"> multiplier <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">})<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* \u6309\u503c\u6355\u83b7 eg2 use = instead*\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #88C0D0\">for_each<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">begin<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">end<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&#91;<\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #ECEFF4\">&#93;(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">){<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> x <\/span><span style=\"color: #81A1C1\">*<\/span><span style=\"color: #D8DEE9FF\"> multiplier <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">})<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #616E88\">    \/* \u6309\u5f15\u7528\u6355\u83b7 *\/<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #88C0D0\">for_each<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">begin<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">vec<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #88C0D0\">end<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&#91;<\/span><span style=\"color: #81A1C1\">&amp;<\/span><span style=\"color: #ECEFF4\">&#93;(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">x<\/span><span style=\"color: #ECEFF4\">){<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        multiplier<\/span><span style=\"color: #81A1C1\">++;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> x <\/span><span style=\"color: #81A1C1\">*<\/span><span style=\"color: #D8DEE9FF\"> multiplier <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">})<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">cout <\/span><span style=\"color: #81A1C1\">&lt;&lt;<\/span><span style=\"color: #D8DEE9FF\"> std<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">endl<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u7f16\u8bd1\u5e76\u8fd0\u884c\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p>g++ lambda_03.cpp -std=c++17 &amp;&amp; .\/a.out<\/p>\n\n\n\n<p>2 4 6 8 10 12<\/p>\n\n\n\n<p>2 4 6 8 10 12<\/p>\n\n\n\n<p>3 8 15 24 35 48<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">\u603b\u7ed3<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>\u5224\u65adlambda\u7684\u4f7f\u7528\u573a\u666f\n<ul class=\"wp-block-list\">\n<li>\u5173\u6ce8\u4f5c\u7528\u57df<\/li>\n\n\n\n<li>\u51fd\u6570\u4f53\u5c11<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>\u6355\u83b7\u65f6\u6ce8\u610f\u662f\u5426\u9700\u8981\u6355\u83b7\uff0c\u82e5\u6355\u83b7\u662f\u6309\u503c\u6355\u83b7\u8fd8\u662f\u6309\u5f15\u7528\u6355\u83b7<\/li>\n<\/ol>\n\n\n\n<p><\/p>\n\n\n\n<p><a href=\"https:\/\/www.bilibili.com\/video\/BV1CD4y1y73q\/?spm_id_from=333.999.0.0&amp;vd_source=29d4fa0f05c21737f4d2d377b8be842d\">C++ lambda\u8868\u8fbe\u5f0f\uff082\uff09_\u54d4\u54e9\u54d4\u54e9_bilibili<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00 lambda\u8868\u8fbe\u5f0f\u7684\u57fa\u672c\u7528\u6cd5 [capture] (params) -&gt; ret {body;}; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":79,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,1,3],"tags":[40,41],"class_list":["post-163","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-c-c","category-uncategorized","category-coding_language","tag-c","tag-lambda"],"_links":{"self":[{"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/posts\/163"}],"collection":[{"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/comments?post=163"}],"version-history":[{"count":27,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/posts\/163\/revisions"}],"predecessor-version":[{"id":417,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/posts\/163\/revisions\/417"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/media\/79"}],"wp:attachment":[{"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/media?parent=163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/categories?post=163"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/yangnanbei.top\/index.php\/wp-json\/wp\/v2\/tags?post=163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}