{"id":1662,"date":"2022-11-17T18:53:27","date_gmt":"2022-11-17T10:53:27","guid":{"rendered":"https:\/\/courtship.top\/?p=1662"},"modified":"2022-11-17T18:53:27","modified_gmt":"2022-11-17T10:53:27","slug":"substr-%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%88%aa%e6%96%ad","status":"publish","type":"post","link":"https:\/\/courtship.top\/index.php\/2022\/11\/17\/substr-%e5%ad%97%e7%ac%a6%e4%b8%b2%e6%88%aa%e6%96%ad\/","title":{"rendered":"substr \u5b57\u7b26\u4e32\u622a\u65ad"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">s.substr(pos, len)<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u8fd4\u56de\u503c\uff1a string\uff0c\u5305\u542bs\u4e2d\u4ecepos\u5f00\u59cb\u7684len\u4e2a\u5b57\u7b26\u7684\u62f7\u8d1d\uff08pos\u7684\u9ed8\u8ba4\u503c\u662f0\uff0clen\u7684\u9ed8\u8ba4\u503c\u662fs.size() - pos\uff0c\u5373\u4e0d\u52a0\u53c2\u6570\u4f1a\u9ed8\u8ba4\u62f7\u8d1d\u6574\u4e2as\uff09<\/li>\n\n\n\n<li>\u5f02\u5e38 \uff1a\u82e5pos\u7684\u503c\u8d85\u8fc7\u4e86string\u7684\u5927\u5c0f\uff0c\u5219substr\u51fd\u6570\u4f1a\u629b\u51fa\u4e00\u4e2aout_of_range\u5f02\u5e38\uff1b\u82e5pos+n\u7684\u503c\u8d85\u8fc7\u4e86string\u7684\u5927\u5c0f\uff0c\u5219substr\u4f1a\u8c03\u6574n\u7684\u503c\uff0c\u53ea\u62f7\u8d1d\u5230string\u7684\u672b\u5c3e<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u83b7\u53d6\u6587\u4ef6\u540d\u540e\u7f00(\u5224\u65ad\u6587\u4ef6\u683c\u5f0f\uff09<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>string Analyser::getFileSuffix(const string&amp; fileName)\n{\n\treturn fileName.substr(fileName.find_last_of('.') + 1);\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u5224\u65ad\u6587\u4ef6\u683c\u5f0f\u662f\u5426\u5408\u6cd5<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>bool GradeManager::fileNmaeisAvaliable(const string &amp;fileName)\n{\n\t\/\/ \u6587\u4ef6\u540d\u4e2d\u4e0d\u80fd\u5305\u542b\\\/:*?\"&lt;>|\u8fd9\u4e9b\u5b57\u7b26\n\tregex regExpress(\"&#91;\\\\\/:*?\\\"&lt;>|]\");\n\tbool pointValid = !std::regex_search(fileName, regExpress);\n\n\tstring suffixx = aser->getFileSuffix(fileName);\n\tbool suffixValid = availableFileType->find(suffixx);\n\n\treturn pointValid &amp;&amp; suffixValid;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>s.substr(pos, len) \u83b7\u53d6\u6587\u4ef6\u540d\u540e\u7f00(\u5224\u65ad\u6587\u4ef6\u683c\u5f0f\uff09 \u5224\u65ad\u6587\u4ef6\u683c\u5f0f\u662f\u5426\u5408\u6cd5<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[22],"tags":[],"class_list":["post-1662","post","type-post","status-publish","format-standard","hentry","category-c"],"_links":{"self":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1662","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/comments?post=1662"}],"version-history":[{"count":0,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/posts\/1662\/revisions"}],"wp:attachment":[{"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/media?parent=1662"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/categories?post=1662"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/courtship.top\/index.php\/wp-json\/wp\/v2\/tags?post=1662"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}