{"id":198417,"date":"2024-11-14T18:13:51","date_gmt":"2024-11-14T10:13:51","guid":{"rendered":"https:\/\/server.hk\/cnblog\/198417\/"},"modified":"2024-11-14T18:13:51","modified_gmt":"2024-11-14T10:13:51","slug":"%e3%80%8clinux-c-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6%e3%80%8d%e7%b0%a1%e4%bb%8b%ef%bc%9a%e5%a6%82%e4%bd%95%e7%8d%b2%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%9c%a8-c-%e8%aa%9e%e8%a8%80%e4%b8%ad","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/198417\/","title":{"rendered":"\u300cLinux C \u5b57\u7b26\u4e32\u9577\u5ea6\u300d\u7c21\u4ecb\uff1a\u5982\u4f55\u7372\u53d6\u5b57\u7b26\u4e32\u5728 C \u8a9e\u8a00\u4e2d\u7684\u9577\u5ea6\u3002 (linux c \u5b57\u7b26\u4e32\u9577\u5ea6)"},"content":{"rendered":"<h1 id=\"%e3%80%8clinux-c-%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6%e3%80%8d%e7%b0%a1%e4%bb%8b%ef%bc%9a%e5%a6%82%e4%bd%95%e7%8d%b2%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%9c%a8-c-%e8%aa%9e%e8%a8%80%e4%b8%ad-ViVZnGRyCF\">\u300cLinux C \u5b57\u7b26\u4e32\u9577\u5ea6\u300d\u7c21\u4ecb\uff1a\u5982\u4f55\u7372\u53d6\u5b57\u7b26\u4e32\u5728 C \u8a9e\u8a00\u4e2d\u7684\u9577\u5ea6<\/h1>\n<p>\u5728 C \u8a9e\u8a00\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e00\u500b\u4ee5 null \u5b57\u7b26\uff08&#8221;\uff09\u7d50\u5c3e\u7684\u5b57\u7b26\u6578\u7d44\u3002\u9019\u7a2e\u7d50\u69cb\u4f7f\u5f97\u5b57\u7b26\u4e32\u7684\u8655\u7406\u8b8a\u5f97\u9748\u6d3b\uff0c\u4f46\u540c\u6642\u4e5f\u5e36\u4f86\u4e86\u4e00\u4e9b\u6311\u6230\uff0c\u7279\u5225\u662f\u5728\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u6642\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 Linux \u74b0\u5883\u4e0b\u4f7f\u7528 C \u8a9e\u8a00\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff0c\u4e26\u63d0\u4f9b\u76f8\u95dc\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e5%ad%97%e7%ac%a6%e4%b8%b2%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-ViVZnGRyCF\">\u5b57\u7b26\u4e32\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728 C \u8a9e\u8a00\u4e2d\uff0c\u5b57\u7b26\u4e32\u5be6\u969b\u4e0a\u662f\u5b57\u7b26\u7684\u6578\u7d44\uff0c\u4e26\u4e14\u4ee5\u4e00\u500b\u7279\u6b8a\u7684\u5b57\u7b26\uff08null \u5b57\u7b26\uff09\u4f5c\u70ba\u7d50\u5c3e\u3002\u9019\u610f\u5473\u8457\uff0c\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u4e0d\u50c5\u53d6\u6c7a\u65bc\u5b57\u7b26\u7684\u6578\u91cf\uff0c\u9084\u53d6\u6c7a\u65bc\u9019\u500b\u7d50\u5c3e\u5b57\u7b26\u7684\u4f4d\u7f6e\u3002\u70ba\u4e86\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff0c\u6211\u5011\u9700\u8981\u904d\u6b77\u5b57\u7b26\u6578\u7d44\uff0c\u76f4\u5230\u9047\u5230 null \u5b57\u7b26\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-strlen-%e5%87%bd%e6%95%b8%e7%8d%b2%e5%8f%96%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-ViVZnGRyCF\">\u4f7f\u7528 strlen \u51fd\u6578\u7372\u53d6\u5b57\u7b26\u4e32\u9577\u5ea6<\/h2>\n<p>C \u6a19\u6e96\u5eab\u63d0\u4f9b\u4e86\u4e00\u500b\u540d\u70ba <code>strlen<\/code> \u7684\u51fd\u6578\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002\u9019\u500b\u51fd\u6578\u7684\u539f\u578b\u5b9a\u7fa9\u5728 <code>string.h<\/code> \u6a19\u982d\u6587\u4ef6\u4e2d\u3002\u4f7f\u7528 <code>strlen<\/code> \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>size_t strlen(const char *str);<\/code><\/pre>\n<p>\u9019\u88e1\uff0c<code>str<\/code> \u662f\u6307\u5411\u5b57\u7b26\u4e32\u7684\u6307\u91dd\uff0c\u800c\u51fd\u6578\u8fd4\u56de\u7684\u662f\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff08\u4e0d\u5305\u62ec null \u5b57\u7b26\uff09\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e4%bb%a3%e7%a2%bc-ViVZnGRyCF\">\u793a\u4f8b\u4ee3\u78bc<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u793a\u4f8b\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528 <code>strlen<\/code> \u51fd\u6578\u4f86\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n#include &lt;string.h&gt;\n\nint main() {\n    const char *str = \"Hello, World!\";\n    size_t length = strlen(str);\n    printf(\"\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u662f: %zun\", length);\n    return 0;\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u5b57\u7b26\u4e32 <code>str<\/code>\uff0c\u7136\u5f8c\u4f7f\u7528 <code>strlen<\/code> \u51fd\u6578\u8a08\u7b97\u5176\u9577\u5ea6\uff0c\u6700\u5f8c\u5c07\u7d50\u679c\u8f38\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<h2 id=\"%e6%89%8b%e5%8b%95%e8%a8%88%e7%ae%97%e5%ad%97%e7%ac%a6%e4%b8%b2%e9%95%b7%e5%ba%a6-ViVZnGRyCF\">\u624b\u52d5\u8a08\u7b97\u5b57\u7b26\u4e32\u9577\u5ea6<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528 <code>strlen<\/code> \u51fd\u6578\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u624b\u52d5\u8a08\u7b97\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002\u9019\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u66f4\u597d\u5730\u7406\u89e3\u5b57\u7b26\u4e32\u7684\u7d50\u69cb\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u624b\u52d5\u8a08\u7b97\u5b57\u7b26\u4e32\u9577\u5ea6\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>#include &lt;stdio.h&gt;\n\nsize_t manual_strlen(const char *str) {\n    size_t length = 0;\n    while (*str != '') {\n        length++;\n        str++;\n    }\n    return length;\n}\n\nint main() {\n    const char *str = \"Hello, World!\";\n    size_t length = manual_strlen(str);\n    printf(\"\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u662f: %zun\", length);\n    return 0;\n}<\/code><\/pre>\n<p>\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b\u540d\u70ba <code>manual_strlen<\/code> \u7684\u51fd\u6578\uff0c\u901a\u904e\u904d\u6b77\u5b57\u7b26\u4e32\u4f86\u8a08\u7b97\u5176\u9577\u5ea6\u3002\u9019\u7a2e\u65b9\u6cd5\u96d6\u7136\u8f03\u70ba\u7e41\u7463\uff0c\u4f46\u80fd\u5920\u5e6b\u52a9\u6211\u5011\u6df1\u5165\u7406\u89e3\u5b57\u7b26\u4e32\u7684\u904b\u4f5c\u539f\u7406\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ViVZnGRyCF\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528 <code>strlen<\/code> \u51fd\u6578\u6216\u624b\u52d5\u8a08\u7b97\u5b57\u7b26\u4e32\u9577\u5ea6\u6642\uff0c\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u5b57\u7b26\u4e32\u4ee5 null \u5b57\u7b26\u7d50\u5c3e\uff0c\u5426\u5247\u53ef\u80fd\u5c0e\u81f4\u672a\u5b9a\u7fa9\u884c\u70ba\u3002<\/li>\n<li>\u5728\u8655\u7406\u5927\u578b\u5b57\u7b26\u4e32\u6642\uff0c\u6ce8\u610f\u6027\u80fd\u554f\u984c\uff0c\u56e0\u70ba <code>strlen<\/code> \u51fd\u6578\u9700\u8981\u904d\u6b77\u6574\u500b\u5b57\u7b26\u4e32\u3002<\/li>\n<li>\u4f7f\u7528 <code>size_t<\/code> \u985e\u578b\u4f86\u5b58\u5132\u9577\u5ea6\uff0c\u4ee5\u907f\u514d\u6ea2\u51fa\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ViVZnGRyCF\">\u7e3d\u7d50<\/h2>\n<p>\u5728 C \u8a9e\u8a00\u4e2d\uff0c\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u4f7f\u7528\u6a19\u6e96\u5eab\u4e2d\u7684 <code>strlen<\/code> \u51fd\u6578\uff0c\u9084\u662f\u624b\u52d5\u8a08\u7b97\u5b57\u7b26\u4e32\u9577\u5ea6\uff0c\u7406\u89e3\u5b57\u7b26\u4e32\u7684\u7d50\u69cb\u548c\u64cd\u4f5c\u90fd\u662f\u5b78\u7fd2 C \u8a9e\u8a00\u7684\u57fa\u790e\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u8655\u7406\u5b57\u7b26\u4e32\u7684\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u6216\u5176\u4ed6 <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u670d\u52d9\u611f\u8208\u8da3\uff0c\u6b61\u8fce\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u4ee5\u7372\u53d6\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728 C \u8a9e\u8a00\u4e2d\u7372\u53d6\u5b57\u7b26\u4e32\u9577\u5ea6\uff0c\u638c\u63e1\u4f7f\u7528 strlen \u51fd\u6578\u53ca\u5176\u61c9\u7528\uff0c\u63d0\u5347\u60a8\u7684 Linux C \u7de8\u7a0b\u6280\u80fd\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-198417","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=198417"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/198417\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=198417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=198417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=198417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}