{"id":520,"date":"2024-11-13T23:47:10","date_gmt":"2024-11-13T15:47:10","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=520"},"modified":"2025-09-20T17:30:22","modified_gmt":"2025-09-20T09:30:22","slug":"1%e5%a4%a7%e4%ba%8e4%ef%bc%9f%e6%88%91%e7%9c%9f%e6%98%af%e8%8d%89%e4%bd%a0%e5%a6%88%e4%ba%86","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=520","title":{"rendered":"-1\u5927\u4e8e4\uff1f"},"content":{"rendered":"\n

\u95ee\u9898\uff1a<\/h1>\n\n\n\n

\u8fd0\u884c\u4ee5\u4e0b\u7a0b\u5e8f\uff0c\u8f93\u5165\u201c\u6f6e\u6e7f\u201d\uff1a<\/p>\n\n\n\n

int main(){\n\tchar * s= new char[50];\n\tcin>>s;\n\tcout<<\"strlen(s):\"<<strlen(s)<<endl;\n\tif(-1<strlen(s)){\n\t\tcout<<\"-1<4\"<<endl;\n\t}else{\n\t\tcout<<\"-1>4\"<<endl;\n\t}\n}<\/code><\/pre>\n\n\n\n
\u7406\u5e94\u5f97\u5230\u8f93\u51fa\uff1a<\/p>\n\n\n\n
\n
strlen(s):4
666<\/p>\n<\/blockquote>\n\n\n\n
\u5b9e\u9645\u8fd0\u884c\u5f97\u5230\uff1a<\/p>\n\n\n\n
\n
strlen(s):4
???<\/p>\n<\/blockquote>\n\n\n\n
                                     \u96be\u9053-1>4\u4e86\uff1f<\/mark><\/strong><\/h1>\n\n\n\n
\u89e3\u51b3\uff1a<\/h1>\n\n\n\n
\u627e\u4e00\u4e0bstrlen\u7684\u8fd4\u56de\u503c\u7c7b\u578b\uff0c\u53d1\u73b0\u662f  size_t<\/code>\uff0c\u8fd9\u662f\u4e00\u4e2a\u65e0\u7b26\u53f7\u6574\u6570\u7c7b\u578b\uff0c\u7528\u4e8e\u8868\u793a\u5927\u5c0f\u548c\u957f\u5ea6\u3002<\/p>\n\n\n\n
\u800c\u5f53 -1\uff08\u4e00\u4e2a\u8d1f\u6574\u6570\uff09\u4e0esize_t<\/code>\u7c7b\u578b\u7684\u503c\u8fdb\u884c\u6bd4\u8f83\u65f6\uff0c\u4f1a\u53d1\u751f\u6574\u6570\u63d0\u5347\uff08integer promotion\uff09\uff0c\u5373\u5c06-1<\/code>\u8f6c\u6362\u4e3a\u4e00\u4e2a\u8db3\u591f\u5927\u7684\u65e0\u7b26\u53f7\u6574\u6570\uff08\u53ef\u80fd\u4e3a0xFFFFFFFF\uff09\uff0c\u4ee5\u4fbf\u80fd\u591f\u8868\u793a-1<\/code>\u7684\u7edd\u5bf9\u503c\u3002\u4e8e\u662f\u201c-1>4\u201d\u4e86\u3002<\/p>\n\n\n\n
\u6539\u6b63\uff1a\u53ea\u9700\u5c06strlen\uff08\uff09\u8fd4\u56de\u503c\u5f3a\u5236\u7c7b\u578b\u8f6c\u6362\u4e3aint\u5373\u53ef\u3002<\/p>\n\n\n\n
        if(-1<(int)strlen(s)){\n\t\tcout<<\"-1<4\"<<endl;\n\t}else{\n\t\tcout<<\"-1>4\"<<endl;\n\t}<\/code><\/pre>\n\n\n\n
\u5f97\u5230\uff1a<\/p>\n\n\n\n
\n
strlen(s):4
666<\/p>\n<\/blockquote>\n\n\n\n
\u5728\u5199\u6570\u636e\u7ed3\u6784\u8bfe\u8bbe\u7684KMP\u6bd4\u8f83\u90e8\u5206\uff0c\u7ed3\u679c\u5f97\u5230\u5168\u90e8\u5339\u914d\u7684\u7ed3\u679c\u3002\u3002\u3002debug\u4e86\u6587\u4ef6\u8bfb\u5199\u3001\u4e2d\u6587\u5b57\u7b26\u95ee\u9898\u3001KMP\u7684\u5199\u6cd5\u95ee\u9898\uff0c\u5c31\u662f\u6ca1\u60f3\u5230\u7ed9\u6211\u5728\u8fd9\u5730\u65b9\u786c\u63a7\u4e86\u62113\u5c0f\u65f6…………………………………………………………..<\/s><\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u95ee\u9898\uff1a \u8fd0\u884c\u4ee5\u4e0b\u7a0b\u5e8f\uff0c\u8f93\u5165\u201c\u6f6e\u6e7f\u201d\uff1a \u7406\u5e94\u5f97\u5230\u8f93\u51fa\uff1a strlen(s):4666 \u5b9e\u9645\u8fd0\u884c\u5f97\u5230\uff1a strle […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79,29,5],"tags":[23,22,55],"class_list":{"0":"post-520","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"hentry","6":"category-bug","7":"category-c","8":"category-5","9":"tag-c","11":"tag-55"},"_links":{"self":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=520"}],"version-history":[{"count":2,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/520\/revisions"}],"predecessor-version":[{"id":523,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=\/wp\/v2\/posts\/520\/revisions\/523"}],"wp:attachment":[{"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=520"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cmd137blog.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}