{"id":186,"date":"2021-10-17T20:51:25","date_gmt":"2021-10-17T12:51:25","guid":{"rendered":"https:\/\/mzdyl.xyz\/?p=186"},"modified":"2022-01-06T11:11:31","modified_gmt":"2022-01-06T03:11:31","slug":"c%e7%ac%94%e8%ae%b0-fgets%ef%bc%88%ef%bc%89","status":"publish","type":"post","link":"https:\/\/mzdyl.xyz\/index.php\/2021\/10\/17\/c%e7%ac%94%e8%ae%b0-fgets%ef%bc%88%ef%bc%89\/","title":{"rendered":"C++\u7b14\u8bb0-fgets\uff08\uff09\uff0cP1957 \u53e3\u7b97\u7ec3\u4e60\u9898"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u63cf\u8ff0<\/h2>\n\n\n\n<p>C \u5e93\u51fd\u6570&nbsp;<strong>char *fgets(char *str, int n, FILE *stream)<\/strong>&nbsp;\u4ece\u6307\u5b9a\u7684\u6d41 stream \u8bfb\u53d6\u4e00\u884c\uff0c\u5e76\u628a\u5b83\u5b58\u50a8\u5728&nbsp;<strong>str<\/strong>&nbsp;\u6240\u6307\u5411\u7684\u5b57\u7b26\u4e32\u5185\u3002\u5f53\u8bfb\u53d6&nbsp;<strong>(n-1)<\/strong>&nbsp;\u4e2a\u5b57\u7b26\u65f6\uff0c\u6216\u8005\u8bfb\u53d6\u5230\u6362\u884c\u7b26\u65f6\uff0c\u6216\u8005\u5230\u8fbe\u6587\u4ef6\u672b\u5c3e\u65f6\uff0c\u5b83\u4f1a\u505c\u6b62\uff0c\u5177\u4f53\u89c6\u60c5\u51b5\u800c\u5b9a\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u58f0\u660e<\/h2>\n\n\n\n<p>\u4e0b\u9762\u662f fgets() \u51fd\u6570\u7684\u58f0\u660e\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">char *fgets(char *str, int n, FILE *stream)<\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u53c2\u6570<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><strong>str<\/strong>&nbsp;&#8212; \u8fd9\u662f\u6307\u5411\u4e00\u4e2a\u5b57\u7b26\u6570\u7ec4\u7684\u6307\u9488\uff0c\u8be5\u6570\u7ec4\u5b58\u50a8\u4e86\u8981\u8bfb\u53d6\u7684\u5b57\u7b26\u4e32\u3002<\/li><li><strong>n<\/strong>&nbsp;&#8212; \u8fd9\u662f\u8981\u8bfb\u53d6\u7684\u6700\u5927\u5b57\u7b26\u6570\uff08\u5305\u62ec\u6700\u540e\u7684\u7a7a\u5b57\u7b26\uff09\u3002\u901a\u5e38\u662f\u4f7f\u7528\u4ee5 str \u4f20\u9012\u7684\u6570\u7ec4\u957f\u5ea6\u3002<\/li><li><strong>stream<\/strong>&nbsp;&#8212; \u8fd9\u662f\u6307\u5411 FILE \u5bf9\u8c61\u7684\u6307\u9488\uff0c\u8be5 FILE \u5bf9\u8c61\u6807\u8bc6\u4e86\u8981\u4ece\u4e2d\u8bfb\u53d6\u5b57\u7b26\u7684\u6d41\u3002<\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">\u8fd4\u56de\u503c<\/h2>\n\n\n\n<p>\u5982\u679c\u6210\u529f\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u76f8\u540c\u7684 str \u53c2\u6570\u3002\u5982\u679c\u5230\u8fbe\u6587\u4ef6\u672b\u5c3e\u6216\u8005\u6ca1\u6709\u8bfb\u53d6\u5230\u4efb\u4f55\u5b57\u7b26\uff0cstr \u7684\u5185\u5bb9\u4fdd\u6301\u4e0d\u53d8\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u7a7a\u6307\u9488\u3002<\/p>\n\n\n\n<p>\u5982\u679c\u53d1\u751f\u9519\u8bef\uff0c\u8fd4\u56de\u4e00\u4e2a\u7a7a\u6307\u9488\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b9e\u4f8b<\/h2>\n\n\n\n<p>\u4e0b\u9762\u7684\u5b9e\u4f8b\u6f14\u793a\u4e86 fgets() \u51fd\u6570\u7684\u7528\u6cd5\u3002<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">#include &lt;stdio.h&gt;\n\nint main()\n{\n   FILE *fp;\n   char str[60];\n\n   \/* \u6253\u5f00\u7528\u4e8e\u8bfb\u53d6\u7684\u6587\u4ef6 *\/\n   fp = fopen(\"file.txt\" , \"r\");\n   if(fp == NULL) {\n      perror(\"\u6253\u5f00\u6587\u4ef6\u65f6\u53d1\u751f\u9519\u8bef\");\n      return(-1);\n   }\n   if( fgets (str, 60, fp)!=NULL ) {\n      \/* \u5411\u6807\u51c6\u8f93\u51fa stdout \u5199\u5165\u5185\u5bb9 *\/\n      puts(str);\n   }\n   fclose(fp);\n   \n   return(0);\n}<\/pre>\n\n\n\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u6587\u672c\u6587\u4ef6&nbsp;<strong>file.txt<\/strong>\uff0c\u5b83\u7684\u5185\u5bb9\u5982\u4e0b\u3002\u6587\u4ef6\u5c06\u4f5c\u4e3a\u5b9e\u4f8b\u4e2d\u7684\u8f93\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">We are in 2014<\/pre>\n\n\n\n<p>\u8ba9\u6211\u4eec\u7f16\u8bd1\u5e76\u8fd0\u884c\u4e0a\u9762\u7684\u7a0b\u5e8f\uff0c\u8fd9\u5c06\u4ea7\u751f\u4ee5\u4e0b\u7ed3\u679c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">We are in 2014\n<\/pre>\n\n\n\n<p>\u4ee5\u4e0a\u6458\u6284\u81ea <a href=\"https:\/\/www.runoob.com\/cprogramming\/c-function-fgets.html\">\u83dc\u9e1f\u6559\u7a0b<\/a>\uff0c\u4ec5\u4f5c\u8bb0\u5f55\uff0c\u9644\u7ec3\u4e60\u9898 <a href=\"https:\/\/www.luogu.com.cn\/problem\/P1957\">P1957 \u53e3\u7b97\u7ec3\u4e60\u9898<\/a><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u9898\u89e3<\/h2>\n\n\n\n<p>\u9898\u76ee\u96be\u70b9\uff0c\u8f93\u5165\u6570\u636e\u4e0d\u56fa\u5b9a\uff0c\u53ef\u80fd\u4e09\u4e2a\u6570\u636e\uff0c\u53ef\u80fd\u4e24\u4e2a\uff0c\u6545\u4f18\u89e3\uff1a\u5c06\u6574\u4e2a\u6570\u636e\u8bfb\u5165\u5b57\u7b26\u6570\u7ec4\u4e2d\uff0c\u7136\u540e\u901a\u8fc7\u5b57\u7b26\u4e32\u5224\u65ad\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528fgets()\u51fd\u6570\u8bfb\u5165\uff0c\u907f\u514d\u4e86get()\u8bed\u53e5\u4e2d\u6570\u636e\u6ea2\u51fa\u98ce\u9669\uff0c\u539f\u56e0 fgets() \u51fd\u6570\u4e2d\u53ef\u4ee5\u5b9a\u4e49\u5b57\u7b26\u6570\u7ec4\u7684\u6700\u5927\u8bfb\u5165\u6570\u91cf\uff0c\u6240\u4ee5\u65e0\u6ea2\u51fa\u98ce\u9669\u3002<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63cf\u8ff0 C \u5e93\u51fd\u6570&nbsp;char *fgets(char *str, int n, FILE *strea [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,10],"tags":[],"class_list":["post-186","post","type-post","status-publish","format-standard","hentry","category-c_plus_note","category-continued"],"_links":{"self":[{"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/posts\/186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/comments?post=186"}],"version-history":[{"count":2,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/posts\/186\/revisions"}],"predecessor-version":[{"id":189,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/posts\/186\/revisions\/189"}],"wp:attachment":[{"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/media?parent=186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/categories?post=186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mzdyl.xyz\/index.php\/wp-json\/wp\/v2\/tags?post=186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}