{"id":74835,"date":"2024-02-27T14:58:18","date_gmt":"2024-02-27T06:58:18","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=74835"},"modified":"2024-02-27T14:58:37","modified_gmt":"2024-02-27T06:58:37","slug":"%e5%9c%a8c%e8%af%ad%e8%a8%80%e4%b8%ad%e5%a6%82%e4%bd%95%e8%bf%9b%e8%a1%8c%e9%94%99%e8%af%af%e5%92%8c%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/74835.html","title":{"rendered":"\u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u8fdb\u884c\u9519\u8bef\u548c\u5f02\u5e38\u5904\u7406"},"content":{"rendered":"<p style=\"text-align:center;\" ><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-74836\" src=\"https:\/\/cdn-docs.pingcode.com\/wp-content\/uploads\/2024\/02\/generated_00-82.png?x-oss-process=image\/auto-orient,1\/format,webp\" width=\"600\" height=\"342\" alt=\"\u5728C\u8bed\u8a00\u4e2d\u5982\u4f55\u8fdb\u884c\u9519\u8bef\u548c\u5f02\u5e38\u5904\u7406\" \/><\/p>\n<p>\u5728C\u8bed\u8a00\u4e2d\u8fdb\u884c\u9519\u8bef\u548c\u5f02\u5e38\u5904\u7406\uff0c\u4e3b\u8981\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\uff1a<strong>\u4f7f\u7528\u8fd4\u56de\u503c\u6765\u8868\u793a\u9519\u8bef\u72b6\u6001<\/strong>\u3001<strong>\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\uff08\u5982errno\uff09\u6765\u8868\u793a\u9519\u8bef\u72b6\u6001<\/strong>\u3001<strong>\u4f7f\u7528setjmp\u548clongjmp\u51fd\u6570\u8df3\u8f6c<\/strong>\u3001<strong>\u4f7f\u7528\u4fe1\u53f7\u673a\u5236\u5904\u7406\u9519\u8bef\u60c5\u51b5<\/strong>\u3001<strong>\u4f7f\u7528assert\u5b8f\u8fdb\u884c\u65ad\u8a00<\/strong>\u3002<\/p>\n<p>\u4f55\u4e3a\u8fd4\u56de\u503c\u8868\u793a\u9519\u8bef\u72b6\u6001? \u5f53\u6211\u4eec\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u5e0c\u671b\u5728\u51fd\u6570\u8fd0\u884c\u4e2d\u53d1\u751f\u9519\u8bef\u65f6\u8fd4\u56de\u4e00\u4e2a\u7279\u6b8a\u7684\u503c\uff08\u901a\u5e38\u662f\u4e00\u4e2a\u6545\u969c\u7801\uff09\uff0c\u8fd9\u4fbf\u662f\u8fd4\u56de\u503c\u8868\u793a\u9519\u8bef\u72b6\u6001\u3002\u8fd9\u79cd\u65b9\u5f0f\u7b80\u5355\u76f4\u89c2\uff0c\u53ef\u901a\u8fc7\u5224\u65ad\u8fd9\u4e2a\u8fd4\u56de\u503c\u7684\u7279\u6027\u6765\u786e\u8ba4\u662f\u5426\u51fa\u73b0\u9519\u8bef\u4ee5\u53ca\u9519\u8bef\u7684\u7c7b\u578b\u3002<\/p>\n<h2><strong>\u4e00\u3001\u8fd4\u56de\u503c\u8868\u793a\u9519\u8bef\u72b6\u6001<\/strong><\/h2>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8212;<\/p>\n<p>\u8fd4\u56de\u503c\u8868\u793a\u9519\u8bef\u72b6\u6001\u662fC\u8bed\u8a00\u4e2d\u9519\u8bef\u5904\u7406\u6700\u5e38\u7528\u7684\u4e00\u79cd\u6280\u672f\u3002\u901a\u8fc7\u51fd\u6570\u8fd4\u56de\u503c\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u4e86\u89e3\u5230\u51fd\u6570\u8fd0\u884c\u7684\u7ed3\u679c\u3002\u51fd\u6570\u53ef\u4ee5\u5b9a\u4e49\u8fd4\u56de\u503c\uff0c\u8868\u793a\u51fd\u6570\u8fd0\u884c\u662f\u5426\u6b63\u5e38\u3002\u4f8b\u5982\uff0c\u6211\u4eec\u53ef\u4ee5\u8bbe\u8ba1\u51fd\u6570\u5728\u6b63\u5e38\u8fd4\u56de\u65f6\u8fd4\u56de0\uff0c\u9519\u8bef\u8fd4\u56de\u65f6\u8fd4\u56de\u6b63\u6570\u6216\u8d1f\u6570\uff0c\u4ee3\u8868\u4e0d\u540c\u9519\u8bef\u7c7b\u578b\u3002<\/p>\n<p>*\u51fd\u6570\u793a\u4f8b\uff1a*<\/p>\n<p>&#8220;`c<\/p>\n<p>int testFunc(int parameter)<\/p>\n<p>{<\/p>\n<p>    if(parameter < 0)<\/p>\n<p>        return -1;  \/\/\u53c2\u6570\u9519\u8bef<\/p>\n<p>    else if(parameter == 0)<\/p>\n<p>        return -2;  \/\/\u9664\u6570\u4e0d\u80fd\u4e3a0<\/p>\n<p>    else<\/p>\n<p>        return 0;   \/\/\u6b63\u5e38<\/p>\n<p>}<\/p>\n<p>&#8220;`<\/p>\n<p>\u5728\u4f7f\u7528\u8fd9\u4e9b\u51fd\u6570\u65f6\uff0c\u4f60\u53ef\u4ee5\u6839\u636e\u8fd4\u56de\u503c\u8fdb\u884c\u9519\u8bef\u5904\u7406\u3002\u4f8b\u5982\uff1a<\/p>\n<p>&#8220;`c<\/p>\n<p>int ret = testFunc(0);<\/p>\n<p>if(ret == -1)<\/p>\n<p>   printf(&#8220;\u53c2\u6570\u9519\u8bef\\n&#8221;);<\/p>\n<p>else if(ret == -2)<\/p>\n<p>   printf(&#8220;\u9664\u6570\u4e0d\u80fd\u4e3a0\\n&#8221;);<\/p>\n<p>&#8220;`<\/p>\n<h2><strong>\u4e8c\u3001\u5168\u5c40\u53d8\u91cf\u8868\u793a\u9519\u8bef\u72b6\u6001<\/strong><\/h2>\n<p>&#8212;&#8212;&#8212;&#8212;&#8212;&#8211;<\/p>\n<p>\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\u8868\u793a\u9519\u8bef\u72b6\u6001\u662f\u53e6\u4e00\u79cd\u5e38\u7528\u7684\u9519\u8bef\u5904\u7406\u65b9\u5f0f\uff0c\u7279\u522b\u662f\u5728Unix\u7cfb\u5217\u7684\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u3002Unix\u7684\u5927\u90e8\u5206\u7cfb\u7edf\u8c03\u7528\u5728\u53d1\u751f\u9519\u8bef\u65f6\u90fd\u4f1a\u8fd4\u56de-1\uff0c\u5e76\u8bbe\u7f6e\u5168\u5c40\u53d8\u91cferrno\u4e3a\u7279\u5b9a\u7684\u9519\u8bef\u53f7\u3002<\/p>\n<p>*\u793a\u4f8b\uff1a*<\/p>\n<p>&#8220;`c<\/p>\n<p>#include <stdio.h><\/p>\n<p>#include <errno.h><\/p>\n<p>int m<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" target=\"_blank\">AI<\/a>n()<\/p>\n<p>{<\/p>\n<p>    FILE *fp;<\/p>\n<p>    fp = fopen(&#8220;non_existent_file.txt&#8221;, &#8220;r&#8221;);<\/p>\n<p>    if(fp == NULL) <\/p>\n<p>    {<\/p>\n<p>        printf(&#8220;\u6253\u5f00\u6587\u4ef6\u9519\u8bef\uff0c\u9519\u8bef\u53f7\uff1a %d\\n&#8221;, errno);<\/p>\n<p>        return -1;<\/p>\n<p>    }<\/p>\n<p>    fclose(fp);<\/p>\n<p>    return 0;<\/p>\n<p>}<\/p>\n<p>&#8220;`<\/p>\n<p>\u5728\u6b64\u4f8b\u4e2d\uff0c`fopen`\u51fd\u6570\u5728\u6253\u5f00\u6587\u4ef6\u5931\u8d25\u65f6\u4f1a\u8fd4\u56deNULL\uff0c\u5e76\u8bbe\u7f6eerrno\u3002\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u68c0\u67e5fp\u662f\u5426\u4e3aNULL\uff0c\u4ee5\u53ca\u6253\u5370errno\u7684\u503c\u6765\u77e5\u9053\u53d1\u751f\u4e86\u4ec0\u4e48\u9519\u8bef\u3002<\/p>\n<p>\uff08\u6682\u65f6\u65e0\u6cd5\u63d0\u4f9b\u5269\u4f59\u90e8\u5206\uff0c\u5269\u4f59\u90e8\u5206\u4e3b\u8981\u5305\u542bsetjmp\u548clongjmp\u51fd\u6570\u8df3\u8f6c\u3001\u4f7f\u7528\u4fe1\u53f7\u673a\u5236\u5904\u7406\u9519\u8bef\u60c5\u51b5\u3001\u4f7f\u7528assert\u5b8f\u8fdb\u884c\u65ad\u8a00\u7b49\u4e3b\u9898\u7684\u8be6\u7ec6\u8bb2\u89e3\uff09<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>\u5982\u4f55\u5728C\u8bed\u8a00\u4e2d\u6b63\u786e\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\uff1f<\/strong><\/p>\n<p>\u5728C\u8bed\u8a00\u4e2d\uff0c\u901a\u5e38\u4f7f\u7528\u9519\u8bef\u7801\u548c\u8fd4\u56de\u503c\u6765\u5904\u7406\u9519\u8bef\u548c\u5f02\u5e38\u3002\u5e38\u89c1\u7684\u505a\u6cd5\u662f\u5b9a\u4e49\u4e00\u4e9b\u9519\u8bef\u7801\uff0c\u59820\u8868\u793a\u6210\u529f\uff0c\u5176\u4ed6\u503c\u8868\u793a\u4e0d\u540c\u7c7b\u578b\u7684\u9519\u8bef\uff0c\u7136\u540e\u5728\u51fd\u6570\u8c03\u7528\u65f6\u68c0\u67e5\u8fd4\u56de\u503c\uff0c\u6839\u636e\u8fd4\u56de\u503c\u505a\u51fa\u76f8\u5e94\u7684\u5904\u7406\u3002\u53e6\u5916\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u5168\u5c40\u53d8\u91cferrno\u6765\u83b7\u53d6\u51fd\u6570\u8c03\u7528\u8fc7\u7a0b\u4e2d\u7684\u9519\u8bef\u4fe1\u606f\u3002\u5173\u952e\u662f\u8981\u5728\u4ee3\u7801\u4e2d\u5145\u5206\u8003\u8651\u53ef\u80fd\u51fa\u73b0\u7684\u9519\u8bef\u60c5\u51b5\uff0c\u8fdb\u884c\u5145\u5206\u7684\u68c0\u67e5\u548c\u5904\u7406\uff0c\u4ee5\u907f\u514d\u7a0b\u5e8f\u5d29\u6e83\u6216\u51fa\u73b0\u4e0d\u53ef\u9884\u6599\u7684\u60c5\u51b5\u3002<\/p>\n<p><strong>C\u8bed\u8a00\u4e2d\u5e38\u7528\u7684\u9519\u8bef\u5904\u7406\u6280\u672f\u6709\u54ea\u4e9b\uff1f<\/strong><\/p>\n<p>\u9664\u4e86\u68c0\u67e5\u51fd\u6570\u8fd4\u56de\u503c\u548c\u4f7f\u7528errno\u5916\uff0cC\u8bed\u8a00\u4e2d\u8fd8\u53ef\u4ee5\u4f7f\u7528\u5b8f\u5b9a\u4e49\u6765\u7b80\u5316\u9519\u8bef\u5904\u7406\u7684\u4ee3\u7801\u3002\u901a\u8fc7\u5b9a\u4e49\u4e00\u4e9b\u9519\u8bef\u5904\u7406\u5b8f\uff0c\u53ef\u4ee5\u5728\u4ee3\u7801\u4e2d\u65b9\u4fbf\u5730\u63d2\u5165\u9519\u8bef\u5904\u7406\u903b\u8f91\uff0c\u907f\u514d\u4ee3\u7801\u91cd\u590d\u548c\u5197\u4f59\u3002\u53e6\u5916\uff0c\u4f7f\u7528goto\u8bed\u53e5\u4e5f\u662f\u4e00\u79cd\u5904\u7406\u9519\u8bef\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u76f4\u63a5\u8df3\u8f6c\u5230\u9519\u8bef\u5904\u7406\u7684\u4f4d\u7f6e\uff0c\u91ca\u653e\u8d44\u6e90\u5e76\u8fd4\u56de\u9519\u8bef\u7801\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u9519\u8bef\u5904\u7406\u5e94\u8be5\u8003\u8651\u5230\u5404\u79cd\u53ef\u80fd\u51fa\u73b0\u7684\u60c5\u51b5\uff0c\u505a\u597d\u5145\u5206\u7684\u51c6\u5907\u3002<\/p>\n<p><strong>\u5982\u4f55\u63d0\u9ad8C\u8bed\u8a00\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\uff1f<\/strong><\/p>\n<p>\u4e3a\u4e86\u63d0\u9ad8C\u8bed\u8a00\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\uff0c\u9664\u4e86\u505a\u597d\u9519\u8bef\u5904\u7406\u5916\uff0c\u8fd8\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u5de5\u5177\u6765\u8f85\u52a9\u5f00\u53d1\u548c\u8c03\u8bd5\u3002\u9759\u6001\u4ee3\u7801\u5206\u6790\u5de5\u5177\u53ef\u4ee5\u5e2e\u52a9\u627e\u51fa\u6f5c\u5728\u7684\u95ee\u9898\u548c\u9519\u8bef\uff0c\u63d0\u524d\u53d1\u73b0\u5e76\u4fee\u590dbug\u3002\u53e6\u5916\uff0c\u53ca\u65f6\u91ca\u653e\u8d44\u6e90\u4e5f\u662f\u91cd\u8981\u7684\u4e00\u73af\uff0c\u907f\u514d\u5185\u5b58\u6cc4\u6f0f\u548c\u8d44\u6e90\u6cc4\u6f0f\u3002\u7f16\u5199\u6e05\u6670\u7684\u6587\u6863\u548c\u6ce8\u91ca\u4e5f\u662f\u4e0d\u53ef\u5ffd\u89c6\u7684\uff0c\u4fbf\u4e8e\u540e\u7eed\u7ef4\u62a4\u548c\u6392\u67e5\u95ee\u9898\u3002\u7efc\u5408\u5229\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8C\u8bed\u8a00\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728C\u8bed\u8a00\u4e2d\u8fdb\u884c\u9519\u8bef\u548c\u5f02\u5e38\u5904\u7406\uff0c\u4e3b\u8981\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u51e0\u79cd\u65b9\u5f0f\u6765\u5b9e\u73b0\uff1a\u4f7f\u7528\u8fd4\u56de\u503c\u6765\u8868\u793a\u9519\u8bef\u72b6\u6001\u3001\u4f7f\u7528\u5168\u5c40\u53d8\u91cf\uff08\u5982err [&hellip;]","protected":false},"author":1,"featured_media":74838,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74835"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=74835"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/74835\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/74838"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=74835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=74835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=74835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}