{"id":6742,"date":"2022-07-11T11:29:24","date_gmt":"2022-07-11T03:29:24","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742"},"modified":"2024-05-30T15:34:11","modified_gmt":"2024-05-30T07:34:11","slug":"c%e8%af%ad%e8%a8%8009-%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742","title":{"rendered":"C\u8bed\u8a0009-\u6570\u7ec4"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/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-3\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E5%AE%9A%E4%B9%89%E6%95%B0%E7%BB%84\" title=\"\u5b9a\u4e49\u6570\u7ec4\">\u5b9a\u4e49\u6570\u7ec4<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E6%95%B0%E7%BB%84%E5%88%9D%E5%A7%8B%E5%8C%96%E7%9A%84%E5%87%A0%E7%A7%8D%E6%96%B9%E6%B3%95%E6%AF%94%E8%BE%83\" title=\"\u6570\u7ec4\u521d\u59cb\u5316\u7684\u51e0\u79cd\u65b9\u6cd5\u6bd4\u8f83\">\u6570\u7ec4\u521d\u59cb\u5316\u7684\u51e0\u79cd\u65b9\u6cd5\u6bd4\u8f83<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E6%95%B0%E7%BB%84%E4%B8%8E%E6%8C%87%E9%92%88\" title=\"\u6570\u7ec4\u4e0e\u6307\u9488\">\u6570\u7ec4\u4e0e\u6307\u9488<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E5%87%BD%E6%95%B0%E4%B8%8E%E6%95%B0%E7%BB%84\" title=\"\u51fd\u6570\u4e0e\u6570\u7ec4\">\u51fd\u6570\u4e0e\u6570\u7ec4<\/a><ul class=\"ez-toc-list-level-4\"><li class=\"ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#1%E5%87%BD%E6%95%B0%E6%97%A0%E6%B3%95%E8%BF%94%E5%9B%9E%E6%95%B0%E7%BB%84\" title=\"1.\u51fd\u6570\u65e0\u6cd5\u8fd4\u56de\u6570\u7ec4\">1.\u51fd\u6570\u65e0\u6cd5\u8fd4\u56de\u6570\u7ec4<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#2sizeof%E9%97%AE%E9%A2%98\" title=\"2.sizeof\u95ee\u9898\">2.sizeof\u95ee\u9898<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-4\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#3c%E8%AF%AD%E8%A8%80_char_%E4%BC%A0%E5%85%A5%E5%87%BD%E6%95%B0_%E5%88%A9%E7%94%A8strcpy%E5%88%B0%E5%87%BD%E6%95%B0%E5%A4%96%E6%B2%A1%E6%9C%89%E8%A2%AB%E6%9B%B4%E6%96%B0\" title=\"3.c\u8bed\u8a00 char* \u4f20\u5165\u51fd\u6570 \u5229\u7528strcpy,\u5230\u51fd\u6570\u5916\u6ca1\u6709\u88ab\u66f4\u65b0.\">3.c\u8bed\u8a00 char* \u4f20\u5165\u51fd\u6570 \u5229\u7528strcpy,\u5230\u51fd\u6570\u5916\u6ca1\u6709\u88ab\u66f4\u65b0.<\/a><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-8\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%8E%E6%95%B0%E7%BB%84\" title=\"\u5b57\u7b26\u4e32\u4e0e\u6570\u7ec4\">\u5b57\u7b26\u4e32\u4e0e\u6570\u7ec4<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-9\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=6742\/#%E6%95%B0%E7%BB%84%E9%97%B4%E7%9A%84%E5%BC%95%E7%94%A8\" title=\"\u6570\u7ec4\u95f4\u7684\u5f15\u7528\">\u6570\u7ec4\u95f4\u7684\u5f15\u7528<\/a><\/li><\/ul><\/nav><\/div>\n<h3><span class=\"ez-toc-section\" id=\"%E5%AE%9A%E4%B9%89%E6%95%B0%E7%BB%84\"><\/span>\u5b9a\u4e49\u6570\u7ec4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/m.php.cn\/article\/417962.html\">https:\/\/m.php.cn\/article\/417962.html<\/a><\/p>\n<p>variable-sized object may not be initialized\uff08\u6570\u7ec4\u7684\u5927\u5c0f\u5fc5\u987b\u662f\u5e38\u91cf\uff09\uff1a<a href=\"https:\/\/blog.csdn.net\/weixin_44216359\/article\/details\/127947762\">https:\/\/blog.csdn.net\/weixin_44216359\/article\/details\/127947762<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%95%B0%E7%BB%84%E5%88%9D%E5%A7%8B%E5%8C%96%E7%9A%84%E5%87%A0%E7%A7%8D%E6%96%B9%E6%B3%95%E6%AF%94%E8%BE%83\"><\/span>\u6570\u7ec4\u521d\u59cb\u5316\u7684\u51e0\u79cd\u65b9\u6cd5\u6bd4\u8f83<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/blog.csdn.net\/qq_19734597\/article\/details\/101516810\">https:\/\/blog.csdn.net\/qq_19734597\/article\/details\/101516810<\/a><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E6%95%B0%E7%BB%84%E4%B8%8E%E6%8C%87%E9%92%88\"><\/span>\u6570\u7ec4\u4e0e\u6307\u9488<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/www.zhihu.com\/question\/418659897\/answer\/2242665892\">https:\/\/www.zhihu.com\/question\/418659897\/answer\/2242665892<\/a> \uff08\u5982\u4f55\u8bc4\u4ef7C\u8bed\u8a00\u8ba9\u6570\u7ec4\u9000\u5316\u4e3a\u6307\u9488\u7684\u8bbe\u8ba1\uff1f\uff09<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%87%BD%E6%95%B0%E4%B8%8E%E6%95%B0%E7%BB%84\"><\/span>\u51fd\u6570\u4e0e\u6570\u7ec4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"1%E5%87%BD%E6%95%B0%E6%97%A0%E6%B3%95%E8%BF%94%E5%9B%9E%E6%95%B0%E7%BB%84\"><\/span>1.\u51fd\u6570\u65e0\u6cd5\u8fd4\u56de\u6570\u7ec4<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p><a href=\"https:\/\/blog.csdn.net\/qq_42366672\/article\/details\/115179783\">https:\/\/blog.csdn.net\/qq_42366672\/article\/details\/115179783<\/a><\/p>\n<p>\u5728c\u8bed\u8a00\u4e2d\u5982\u679c\u76f4\u63a5\u8fd4\u56de\u6570\u7ec4\u7c7b\u578b\uff0c\u4f1a\u7f16\u8bd1\u62a5\u9519\u3002<\/p>\n<pre><code class=\"language-c\">char[] test(){\n    char buf[128];\n    return buf;\n}<\/code><\/pre>\n<p>\u53ea\u80fd\u901a\u8fc7\u6307\u9488\u7684\u65b9\u5f0f\u8fd4\u56de<\/p>\n<pre><code class=\"language-c\">char* test(){\n    char buf[128];\n    return buf;\n}<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"2sizeof%E9%97%AE%E9%A2%98\"><\/span>2.sizeof\u95ee\u9898<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5b9a\u4e49\u4e00\u4e2achar\u6570\u7ec4<\/p>\n<pre><code class=\"language-c\">char buf[128];\nsizeof(buf);   \/\/\u7ed3\u679c\u4e3a128<\/code><\/pre>\n<p>\u5982\u679c\u628abuf\u4f20\u5165\u51fd\u6570<\/p>\n<pre><code class=\"language-c\">void test(char[] bufOut){\n    sizeof(bufOut);   \/\/\u7ed3\u679c\u4e3a8\n}\ntest(buf);<\/code><\/pre>\n<p>\u8fd9\u662f\u56e0\u4e3atest\u51fd\u6570\u7684\u53c2\u6570bufOut\u5b9e\u9645\u4e3abuf\u6570\u7ec4\u7684\u6307\u9488\uff0csizeof(bufOut)\u59cb\u7ec8\u5c31\u662f\u6307\u9488\u7c7b\u578b\u7684\u5927\u5c0f\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"3c%E8%AF%AD%E8%A8%80_char_%E4%BC%A0%E5%85%A5%E5%87%BD%E6%95%B0_%E5%88%A9%E7%94%A8strcpy%E5%88%B0%E5%87%BD%E6%95%B0%E5%A4%96%E6%B2%A1%E6%9C%89%E8%A2%AB%E6%9B%B4%E6%96%B0\"><\/span>3.c\u8bed\u8a00 char* \u4f20\u5165\u51fd\u6570 \u5229\u7528strcpy,\u5230\u51fd\u6570\u5916\u6ca1\u6709\u88ab\u66f4\u65b0.<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5728C\u8bed\u8a00\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u5b57\u7b26\u6570\u7ec4\uff0c\u5f53\u4f60\u628a\u4e00\u4e2a\u5b57\u7b26\u4e32\u4f20\u9012\u7ed9\u51fd\u6570\u65f6\uff0c\u5b9e\u9645\u4e0a\u4f20\u9012\u7684\u662f\u8fd9\u4e2a\u5b57\u7b26\u6570\u7ec4\u7684\u4e00\u4e2a\u62f7\u8d1d\uff0c\u6240\u4ee5\u5982\u679c\u4f60\u5728\u51fd\u6570\u5185\u90e8\u4f7f\u7528strcpy\u66f4\u65b0\u8fd9\u4e2a\u62f7\u8d1d\uff0c\u5f53\u51fd\u6570\u6267\u884c\u5b8c\u6bd5\u8fd4\u56de\u65f6\uff0c\u539f\u59cb\u7684\u5b57\u7b26\u4e32\u662f\u4e0d\u4f1a\u88ab\u66f4\u65b0\u7684\u3002<\/p>\n<p>\u89e3\u51b3\u529e\u6cd5\uff1a\u51fd\u6570\u76f4\u63a5\u8fd4\u56dechar*<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%8E%E6%95%B0%E7%BB%84\"><\/span>\u5b57\u7b26\u4e32\u4e0e\u6570\u7ec4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\u5b57\u7b26\u6570\u7ec4\u6e05\u7a7a\n<pre><code class=\"language-c\">char str[100];\nmemset(str, 0, sizeof(str));<\/code><\/pre>\n<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E6%95%B0%E7%BB%84%E9%97%B4%E7%9A%84%E5%BC%95%E7%94%A8\"><\/span>\u6570\u7ec4\u95f4\u7684\u5f15\u7528<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\n<p>1.\u6570\u7ec4\u4e0d\u80fd\u7528\u7b49\u53f7\u62f7\u8d1d<br \/>\n<img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2022\/07\/\u641c\u72d7\u622a\u56fe20230417094025.png\" alt=\"\" \/><\/p>\n<\/li>\n<li>\n<p>2.Array type 'char[50]' is not assignable<\/p>\n<\/li>\n<\/ul>\n<p>\u5728C\u6216C++\u7b49\u7f16\u7a0b\u8bed\u8a00\u4e2d\uff0c\u57fa\u672c\u6570\u636e\u7c7b\u578b\u5982int, float, double\u7b49\u53ef\u4ee5\u76f4\u63a5\u8d4b\u503c\uff0c\u4f46\u662f\u6570\u7ec4\u7c7b\u578b\uff08\u6bd4\u5982char[50]\uff09\u901a\u5e38\u4e0d\u80fd\u76f4\u63a5\u8d4b\u503c\uff0c\u56e0\u4e3a\u5b83\u4eec\u4ee3\u8868\u7684\u662f\u4e00\u4e2a\u5185\u5bb9\u53ef\u53d8\u7684\u6570\u636e\u96c6\u5408\uff0c\u800c\u8d4b\u503c\u64cd\u4f5c\u901a\u5e38\u662f\u6d45\u62f7\u8d1d\uff0c\u8fd9\u610f\u5473\u7740\u5982\u679c\u4f60\u5c1d\u8bd5\u62f7\u8d1d\u4e00\u4e2a\u6570\u7ec4\u5230\u53e6\u4e00\u4e2a\u6570\u7ec4\uff0c\u5b9e\u9645\u4e0a\u662f\u62f7\u8d1d\u7684\u6570\u7ec4\u7684\u5f15\u7528\u800c\u4e0d\u662f\u6570\u7ec4\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u89e3\u51b3\u65b9\u6cd5\uff1a<br \/>\n\u8981\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u4f60\u9700\u8981\u904d\u5386\u6570\u7ec4\u5e76\u9010\u4e2a\u590d\u5236\u5143\u7d20\u3002\u53ef\u4ee5\u4f7f\u7528\u6807\u51c6\u5e93\u4e2d\u7684strcpy\u51fd\u6570\uff08\u6765\u81ea<string.h>\u5934\u6587\u4ef6\uff09\uff0c\u5b83\u7528\u4e8e\u590d\u5236\u5b57\u7b26\u4e32\uff08\u5373char\u6570\u7ec4\uff09\u3002\u5982\u679c\u4f60\u6b63\u5728\u5904\u7406\u975e\u5b57\u7b26\u4e32\u6570\u7ec4\uff0c\u4f60\u9700\u8981\u624b\u52a8\u904d\u5386\u6570\u7ec4\u5e76\u590d\u5236\u6bcf\u4e2a\u5143\u7d20\u3002<\/p>\n<p>\u793a\u4f8b\uff08\u5bf9\u4e8e\u5b57\u7b26\u4e32\u6570\u7ec4\uff09\uff1a<\/p>\n<pre><code class=\"language-c\">#include &lt;string.h&gt;\n\nchar str1[50] = &quot;Hello&quot;;\nchar str2[50];\nstrcpy(str2, str1); \/\/ \u6b63\u786e\u65b9\u6cd5\uff1a\u590d\u5236\u5b57\u7b26\u4e32<\/code><\/pre>\n<button class=\"simplefavorite-button\" data-postid=\"6742\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u76ee\u5f55 \u5b9a\u4e49\u6570\u7ec4\u6570\u7ec4\u521d\u59cb\u5316\u7684\u51e0\u79cd\u65b9\u6cd5\u6bd4\u8f83\u6570\u7ec4\u4e0e\u6307\u9488\u51fd\u6570\u4e0e\u6570\u7ec41.\u51fd\u6570\u65e0\u6cd5\u8fd4\u56de\u6570\u7ec42.sizeof\u95ee\u98983 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[970],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/6742"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6742"}],"version-history":[{"count":13,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/6742\/revisions"}],"predecessor-version":[{"id":13687,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/6742\/revisions\/13687"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6742"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6742"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6742"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}