{"id":98904,"date":"2024-03-22T00:13:27","date_gmt":"2024-03-21T15:13:27","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aefread%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%b3%95%e3%81%af%ef%bc%9f\/"},"modified":"2024-04-04T23:59:43","modified_gmt":"2024-04-04T14:59:43","slug":"%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aefread%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%b3%95%e3%81%af%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aefread%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e7%94%a8%e6%b3%95%e3%81%af%ef%bc%9f\/","title":{"rendered":"\uff23\u8a00\u8a9e\u306efread\u95a2\u6570\u306e\u4f7f\u7528\u6cd5\u306f\uff1f"},"content":{"rendered":"<p>fread\u51fd\u6570\u7684\u7528\u6cd5\u662f\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u5176\u51fd\u6570\u539f\u578b\u4e3a\uff1a<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">size_t<\/span> <span class=\"hljs-title function_\">fread<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">void<\/span> *ptr, <span class=\"hljs-type\">size_t<\/span> size, <span class=\"hljs-type\">size_t<\/span> count, FILE *stream)<\/span>;\r\n<\/code><\/pre>\n<p>\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8aac\u660e\uff1a<\/p>\n<ol>\n<li>ptr\uff1a\u6307\u5411\u5b58\u50a8\u8bfb\u53d6\u6570\u636e\u7684\u7f13\u51b2\u533a\u7684\u6307\u9488\u3002<\/li>\n<li>\u30b5\u30a4\u30ba\uff1a\u30c7\u30fc\u30bf\u9805\u76ee\u3054\u3068\u306e\u30d0\u30a4\u30c8\u6570\u3002<\/li>\n<li>\u8aad\u53d6\u30c7\u30fc\u30bf\u9805\u76ee\u306e\u6570<\/li>\n<li>\u30b9\u30c8\u30ea\u30fc\u30e0\u306f\u8aad\u307f\u8fbc\u3080\u30d5\u30a1\u30a4\u30eb\u3092\u8868\u3059\u30d5\u30a1\u30a4\u30eb\u30dd\u30a4\u30f3\u30bf\u3067\u3059\u3002<\/li>\n<\/ol>\n<p>\u51fd\u6570\u8fd4\u56de\u503c\u4e3a\u5b9e\u9645\u8bfb\u53d6\u7684\u6570\u636e\u9879\u4e2a\u6570\uff0c\u5982\u679c\u8bfb\u53d6\u5931\u8d25\u6216\u5df2\u5230\u8fbe\u6587\u4ef6\u672b\u5c3e\uff0c\u8fd4\u56de\u503c\u53ef\u80fd\u5c0f\u4e8ecount\u3002<\/p>\n<p>fread()\u95a2\u6570\u306f\u3001\u6307\u5b9a\u3055\u308c\u305f\u30d0\u30a4\u30c8\u6570\u3084\u6570\u306b\u5f93\u3063\u3066\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u6307\u5b9a\u3055\u308c\u305f\u30c7\u30fc\u30bf\u3092\u30d0\u30c3\u30d5\u30a1\u306b\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3067\u306f\u30d5\u30a1\u30a4\u30eb\u304b\u308910\u500b\u306eint\u578b\u30c7\u30fc\u30bf\u3092\u884c\u5217\u306b\u8aad\u307f\u8fbc\u3093\u3067\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;stdio.h&gt;<\/span><\/span>\r\n\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span> {\r\n    FILE *fp;\r\n    <span class=\"hljs-type\">int<\/span> data[<span class=\"hljs-number\">10<\/span>];\r\n\r\n    fp = fopen(<span class=\"hljs-string\">\"data.txt\"<\/span>, <span class=\"hljs-string\">\"rb\"<\/span>);\r\n    <span class=\"hljs-keyword\">if<\/span> (fp == <span class=\"hljs-literal\">NULL<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to open file.\\n\"<\/span>);\r\n        <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">-1<\/span>;\r\n    }\r\n\r\n    <span class=\"hljs-type\">size_t<\/span> num = fread(data, <span class=\"hljs-keyword\">sizeof<\/span>(<span class=\"hljs-type\">int<\/span>), <span class=\"hljs-number\">10<\/span>, fp);\r\n    <span class=\"hljs-keyword\">if<\/span> (num &lt; <span class=\"hljs-number\">10<\/span>) {\r\n        <span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"Failed to read data from file.\\n\"<\/span>);\r\n    }\r\n\r\n    fclose(fp);\r\n\r\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>fread\u51fd\u6570\u7684\u7528\u6cd5\u662f\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u5176\u51fd\u6570\u539f\u578b\u4e3a\uff1a size_t fread(void *ptr, size_t size, size_t count, FILE *stream); \u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8aac\u660e\uff1a ptr\uff1a [&hellip;]<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-98904","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uff23\u8a00\u8a9e\u306efread\u95a2\u6570\u306e\u4f7f\u7528\u6cd5\u306f\uff1f - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/\uff43\u8a00\u8a9e\u306efread\u95a2\u6570\u306e\u4f7f\u7528\u6cd5\u306f\uff1f\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\uff23\u8a00\u8a9e\u306efread\u95a2\u6570\u306e\u4f7f\u7528\u6cd5\u306f\uff1f\" \/>\n<meta property=\"og:description\" content=\"fread\u51fd\u6570\u7684\u7528\u6cd5\u662f\u7528\u4e8e\u4ece\u6587\u4ef6\u4e2d\u8bfb\u53d6\u6570\u636e\u3002\u5176\u51fd\u6570\u539f\u578b\u4e3a\uff1a size_t fread(void *ptr, size_t size, size_t count, FILE *stream); 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