{"id":1639,"date":"2026-05-24T00:44:54","date_gmt":"2026-05-23T16:44:54","guid":{"rendered":"http:\/\/wordpress.fangt.online\/?p=1639"},"modified":"2026-05-24T00:44:54","modified_gmt":"2026-05-23T16:44:54","slug":"%e8%87%aa%e5%ae%9a%e4%b9%89%e5%87%bd%e6%95%b0%e6%b7%b1%e5%85%a5","status":"publish","type":"post","link":"http:\/\/wordpress.fangt.online\/index.php\/2026\/05\/24\/%e8%87%aa%e5%ae%9a%e4%b9%89%e5%87%bd%e6%95%b0%e6%b7%b1%e5%85%a5\/","title":{"rendered":"\u81ea\u5b9a\u4e49\u51fd\u6570\u6df1\u5165"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1. \u51fd\u6570\u7684\u58f0\u660e\u4e0e\u5b9a\u4e49<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u58f0\u660e\uff08Declaration\uff09<\/strong>\uff1a\u544a\u8bc9\u7f16\u8bd1\u5668\u51fd\u6570\u7684\u540d\u5b57\u3001\u8fd4\u56de\u7c7b\u578b\u3001\u53c2\u6570\u5217\u8868\u3002\u4e0d\u5305\u542b\u51fd\u6570\u4f53\u3002<\/li>\n\n\n\n<li><strong>\u5b9a\u4e49\uff08Definition\uff09<\/strong>\uff1a\u7ed9\u51fa\u51fd\u6570\u7684\u5177\u4f53\u5b9e\u73b0\uff08\u51fd\u6570\u4f53\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;\nusing namespace std;\n\n\/\/ \u51fd\u6570\u58f0\u660e\uff08\u539f\u578b\uff09\nint max(int a, int b);\n\n\/\/ \u4e3b\u51fd\u6570\nint main() {\n    cout &lt;&lt; max(10, 20) &lt;&lt; endl;  \/\/ \u8c03\u7528\n    return 0;\n}\n\n\/\/ \u51fd\u6570\u5b9a\u4e49\nint max(int a, int b) {\n    return (a &gt; b) ? a : b;\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f<\/strong>\uff1a\u5982\u679c\u5b9a\u4e49\u5728\u8c03\u7528\u4e4b\u524d\uff0c\u53ef\u4ee5\u7701\u7565\u5355\u72ec\u58f0\u660e\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">2. \u51fd\u6570\u7684\u5f62\u53c2\u4e0e\u5b9e\u53c2<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u5f62\u53c2\uff08Parameter\uff09<\/strong>\uff1a\u5b9a\u4e49\u51fd\u6570\u65f6\u62ec\u53f7\u5185\u7684\u53d8\u91cf\uff0c\u7528\u4e8e\u63a5\u6536\u6570\u636e\u3002<\/li>\n\n\n\n<li><strong>\u5b9e\u53c2\uff08Argument\uff09<\/strong>\uff1a\u8c03\u7528\u51fd\u6570\u65f6\u4f20\u7ed9\u51fd\u6570\u7684\u5177\u4f53\u503c\u6216\u53d8\u91cf\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void printSum(int x, int y) {   \/\/ x, y \u662f\u5f62\u53c2\n    cout &lt;&lt; x + y &lt;&lt; endl;\n}\n\nint main() {\n    int a = 5, b = 3;\n    printSum(a, b);  \/\/ a, b \u662f\u5b9e\u53c2\n    return 0;\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u5b9e\u53c2\u4f1a\u628a\u81ea\u5df1\u7684\u503c<strong>\u62f7\u8d1d<\/strong>\u7ed9\u5f62\u53c2\uff08\u53d6\u51b3\u4e8e\u4f20\u9012\u65b9\u5f0f\uff0c\u89c1\u4e0b\u8282\uff09\u3002<\/p>\n<\/blockquote>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">3. \u51fd\u6570\u7684\u503c\u4f20\u9012\u3001\u5f15\u7528\u4f20\u9012\u3001\u5730\u5740\u4f20\u9012<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">3.1 \u503c\u4f20\u9012\uff08Pass by Value\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5c06\u5b9e\u53c2\u7684\u503c<strong>\u62f7\u8d1d<\/strong>\u4e00\u4efd\u7ed9\u5f62\u53c2\u3002<\/li>\n\n\n\n<li>\u51fd\u6570\u5185\u90e8\u4fee\u6539\u5f62\u53c2<strong>\u4e0d\u5f71\u54cd<\/strong>\u5b9e\u53c2\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void changeVal(int n) {\n    n = 100;  \/\/ \u53ea\u4fee\u6539\u4e86\u62f7\u8d1d\n}\n\nint main() {\n    int a = 5;\n    changeVal(a);\n    cout &lt;&lt; a;  \/\/ \u8f93\u51fa 5\uff0c\u672a\u6539\u53d8\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3.2 \u5f15\u7528\u4f20\u9012\uff08Pass by Reference\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f62\u53c2\u662f\u5b9e\u53c2\u7684<strong>\u522b\u540d<\/strong>\uff0c\u64cd\u4f5c\u5f62\u53c2\u5373\u64cd\u4f5c\u5b9e\u53c2\u672c\u8eab\u3002<\/li>\n\n\n\n<li>\u4f7f\u7528 <code>&amp;<\/code> \u58f0\u660e\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void changeRef(int &amp;n) {\n    n = 100;   \/\/ \u76f4\u63a5\u4fee\u6539\u539f\u53d8\u91cf\n}\n\nint main() {\n    int a = 5;\n    changeRef(a);\n    cout &lt;&lt; a;  \/\/ \u8f93\u51fa 100\n    return 0;\n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f18\u70b9<\/strong>\uff1a\u907f\u514d\u62f7\u8d1d\uff08\u5c24\u5176\u9002\u5408\u5927\u5bf9\u8c61\uff09\uff0c\u53ef\u76f4\u63a5\u4fee\u6539\u5b9e\u53c2\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">3.3 \u5730\u5740\u4f20\u9012\uff08Pass by Pointer\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5f62\u53c2\u4e3a\u6307\u9488\uff0c\u63a5\u6536\u5b9e\u53c2\u7684\u5730\u5740\u3002<\/li>\n\n\n\n<li>\u901a\u8fc7\u89e3\u5f15\u7528\u64cd\u4f5c\u5b9e\u53c2\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void changePtr(int *n) {\n    *n = 100;   \/\/ \u901a\u8fc7\u5730\u5740\u4fee\u6539\u539f\u53d8\u91cf\n}\n\nint main() {\n    int a = 5;\n    changePtr(&amp;a);  \/\/ \u4f20\u5730\u5740\n    cout &lt;&lt; a;      \/\/ \u8f93\u51fa 100\n    return 0;\n}<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\"><strong>\u6ce8\u610f<\/strong>\uff1a\u5730\u5740\u4f20\u9012\u672c\u8d28\u4e0a\u4e5f\u662f\u503c\u4f20\u9012\uff08\u62f7\u8d1d\u4e86\u6307\u9488\u7684\u503c\uff09\uff0c\u4f46\u901a\u8fc7\u8be5\u5730\u5740\u53ef\u8bbf\u95ee\u539f\u53d8\u91cf\u3002<\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">\u4e09\u79cd\u4f20\u9012\u65b9\u5f0f\u5bf9\u6bd4\u8868<\/h3>\n\n\n\n<figure class=\"wp-block-table has-small-font-size\"><table><thead><tr><th>\u4f20\u9012\u65b9\u5f0f<\/th><th>\u662f\u5426\u4fee\u6539\u5b9e\u53c2<\/th><th>\u4f20\u9012\u5185\u5bb9<\/th><th>\u9002\u5408\u573a\u666f<\/th><\/tr><\/thead><tbody><tr><td>\u503c\u4f20\u9012<\/td><td>\u5426<\/td><td>\u503c\u7684\u62f7\u8d1d<\/td><td>\u57fa\u672c\u7c7b\u578b\u3001\u5c0f\u5bf9\u8c61<\/td><\/tr><tr><td>\u5f15\u7528\u4f20\u9012<\/td><td>\u662f<\/td><td>\u5f15\u7528\uff08\u522b\u540d\uff09<\/td><td>\u9700\u4fee\u6539\u5b9e\u53c2\u3001\u5927\u5bf9\u8c61<\/td><\/tr><tr><td>\u5730\u5740\u4f20\u9012<\/td><td>\u662f<\/td><td>\u5730\u5740\uff08\u6307\u9488\uff09<\/td><td>\u9700\u8981\u6307\u9488\u8bed\u4e49\u6216\u53ef\u4e3a\u7a7a<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">4. \u51fd\u6570\u7684\u4f5c\u7528\u57df<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">4.1 \u5c40\u90e8\u4f5c\u7528\u57df<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u51fd\u6570\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\uff08\u5305\u62ec\u5f62\u53c2\uff09\u53ea\u80fd\u5728\u51fd\u6570\u5185\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>\u51fd\u6570\u7ed3\u675f\u540e\u81ea\u52a8\u9500\u6bc1\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void func() {\n    int localVar = 10;  \/\/ \u5c40\u90e8\u53d8\u91cf\n    cout &lt;&lt; localVar;   \/\/ \u2705 \u53ef\u8bbf\u95ee\n}\n\nint main() {\n    \/\/ cout &lt;&lt; localVar;  \/\/ \u274c \u9519\u8bef\uff0c\u4e0d\u53ef\u8bbf\u95ee\n    return 0;\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4.2 \u5168\u5c40\u4f5c\u7528\u57df<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5b9a\u4e49\u5728\u6240\u6709\u51fd\u6570\u4e4b\u5916\u7684\u53d8\u91cf\uff0c\u53ef\u5728\u51fd\u6570\u5185\u76f4\u63a5\u8bbf\u95ee\u3002<\/li>\n\n\n\n<li>\u82e5\u5c40\u90e8\u53d8\u91cf\u4e0e\u5168\u5c40\u53d8\u91cf\u540c\u540d\uff0c\u5c40\u90e8\u4f1a\u8986\u76d6\u5168\u5c40\uff08\u53ef\u4f7f\u7528 <code>::<\/code> \u8bbf\u95ee\u5168\u5c40\uff09\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>int global = 100;  \/\/ \u5168\u5c40\u53d8\u91cf\n\nvoid test() {\n    int global = 200;        \/\/ \u5c40\u90e8\u8986\u76d6\n    cout &lt;&lt; global &lt;&lt; endl;  \/\/ \u8f93\u51fa 200\n    cout &lt;&lt; ::global &lt;&lt; endl; \/\/ \u8f93\u51fa 100\uff08:: \u8bbf\u95ee\u5168\u5c40\uff09\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">4.3 \u9759\u6001\u5c40\u90e8\u53d8\u91cf\uff08static\uff09<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5728\u51fd\u6570\u5185\u7528 <code>static<\/code> \u4fee\u9970\uff0c\u53ea\u521d\u59cb\u5316\u4e00\u6b21\uff0c\u51fd\u6570\u7ed3\u675f\u540e<strong>\u4e0d\u9500\u6bc1<\/strong>\uff0c\u4e0b\u6b21\u8c03\u7528\u4fdd\u7559\u4e0a\u6b21\u7684\u503c\u3002<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>void counter() {\n    static int count = 0;  \/\/ \u53ea\u521d\u59cb\u5316\u4e00\u6b21\n    count++;\n    cout &lt;&lt; \"\u8c03\u7528\u6b21\u6570: \" &lt;&lt; count &lt;&lt; endl;\n}\n\nint main() {\n    counter();  \/\/ \u8c03\u7528\u6b21\u6570: 1\n    counter();  \/\/ \u8c03\u7528\u6b21\u6570: 2\n    return 0;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>1. \u51fd\u6570\u7684\u58f0\u660e\u4e0e\u5b9a\u4e49 \u6ce8\u610f\uff1a\u5982\u679c\u5b9a\u4e49\u5728\u8c03\u7528\u4e4b\u524d\uff0c\u53ef\u4ee5\u7701\u7565\u5355\u72ec\u58f0\u660e\u3002 2. \u51fd\u6570\u7684\u5f62\u53c2\u4e0e\u5b9e\u53c2 \u5b9e\u53c2\u4f1a\u628a\u81ea\u5df1\u7684\u503c [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[61],"tags":[],"class_list":["post-1639","post","type-post","status-publish","format-standard","hentry","category-zl"],"_links":{"self":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1639","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/comments?post=1639"}],"version-history":[{"count":1,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1639\/revisions"}],"predecessor-version":[{"id":1640,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/posts\/1639\/revisions\/1640"}],"wp:attachment":[{"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/media?parent=1639"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/categories?post=1639"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wordpress.fangt.online\/index.php\/wp-json\/wp\/v2\/tags?post=1639"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}