{"id":124290,"date":"2024-03-24T14:37:18","date_gmt":"2024-03-24T05:37:18","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aestrstr%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/"},"modified":"2024-04-05T20:42:20","modified_gmt":"2024-04-05T11:42:20","slug":"%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aestrstr%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%ef%bd%83%e8%a8%80%e8%aa%9e%e3%81%aestrstr%e9%96%a2%e6%95%b0%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9\/","title":{"rendered":"\uff23\u8a00\u8a9e\u306estrstr\u95a2\u6570\u306e\u4f7f\u3044\u65b9"},"content":{"rendered":"<p>strstr\u95a2\u6570\u306f\u3001\u3042\u308b\u6587\u5b57\u5217\u306e\u5225\u306e\u6587\u5b57\u5217\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u5ba3\u8a00\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-type\">char<\/span> *<span class=\"hljs-title function_\">strstr<\/span><span class=\"hljs-params\">(<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *haystack, <span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *needle)<\/span>;\r\n<\/code><\/pre>\n<p>haystack\u306f\u691c\u7d22\u5bfe\u8c61\u306e\u6587\u5b57\u5217\u3001needle\u306f\u691c\u7d22\u5bfe\u8c61\u306e\u90e8\u5206\u6587\u5b57\u5217\u3092\u8868\u3059\u3002<\/p>\n<p>\u4f7f\u7528\u65b9\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\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<span class=\"hljs-meta\">#<span class=\"hljs-keyword\">include<\/span> <span class=\"hljs-string\">&lt;string.h&gt;<\/span><\/span>\r\n<span class=\"hljs-type\">int<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">()<\/span>\r\n{\r\n<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *haystack = <span class=\"hljs-string\">\"Hello, World!\"<\/span>;\r\n<span class=\"hljs-type\">const<\/span> <span class=\"hljs-type\">char<\/span> *needle = <span class=\"hljs-string\">\"World\"<\/span>;\r\n<span class=\"hljs-type\">char<\/span> *result = <span class=\"hljs-built_in\">strstr<\/span>(haystack, needle);\r\n<span class=\"hljs-keyword\">if<\/span>(result != <span class=\"hljs-literal\">NULL<\/span>)\r\n{\r\n<span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"'%s' is found in '%s' at position %ld\\n\"<\/span>, needle, haystack, result - haystack);\r\n}\r\n<span class=\"hljs-keyword\">else<\/span>\r\n{\r\n<span class=\"hljs-built_in\">printf<\/span>(<span class=\"hljs-string\">\"'%s' is not found in '%s'\\n\"<\/span>, needle, haystack);\r\n}\r\n<span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\r\n}\r\n<\/code><\/pre>\n<p>\u51fa\u529b\u3092\u65e5\u672c\u306e\u30cd\u30a4\u30c6\u30a3\u30d6\u306b\u8868\u73fe\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u30011\u3064\u306e\u30aa\u30d7\u30b7\u30e7\u30f3\u306e\u307f\u304c\u5fc5\u8981\u3067\u3059\u304b?<\/p>\n<pre class=\"post-pre\"><code>'World' is found in 'Hello, World!' at position 7\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u307e\u305ahaystack\u6587\u5b57\u5217\u3068needles\u6587\u5b57\u5217\u3092\u5b9a\u7fa9\u3057\u307e\u3059\u3002\u6b21\u306b\u3001strstr\u95a2\u6570\u3092\u7528\u3044\u3066haystack\u6587\u5b57\u5217\u5185\u3067needles\u6587\u5b57\u5217\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u898b\u3064\u304b\u308c\u3070\u3001\u305d\u306e\u4f4d\u7f6e\u3092\u793a\u3059\u30dd\u30a4\u30f3\u30bf\u304c\u8fd4\u3055\u308c\u3001\u898b\u3064\u304b\u3089\u306a\u3051\u308c\u3070NULL\u304c\u8fd4\u3055\u308c\u307e\u3059\u3002\u6700\u5f8c\u306b\u3001\u8fd4\u3055\u308c\u305f\u7d50\u679c\u306b\u57fa\u3065\u3044\u3066\u9069\u5207\u306a\u51fa\u529b\u304c\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>strstr\u95a2\u6570\u306f\u3001\u3042\u308b\u6587\u5b57\u5217\u306e\u5225\u306e\u6587\u5b57\u5217\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u5ba3\u8a00\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002 char *strstr(const char *haystack, const char *needle); haystack\u306f\u691c [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-124290","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\u306estrstr\u95a2\u6570\u306e\u4f7f\u3044\u65b9 - 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\u306estrstr\u95a2\u6570\u306e\u4f7f\u3044\u65b9\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\uff23\u8a00\u8a9e\u306estrstr\u95a2\u6570\u306e\u4f7f\u3044\u65b9\" \/>\n<meta property=\"og:description\" content=\"strstr\u95a2\u6570\u306f\u3001\u3042\u308b\u6587\u5b57\u5217\u306e\u5225\u306e\u6587\u5b57\u5217\u306e\u51fa\u73fe\u4f4d\u7f6e\u3092\u691c\u7d22\u3057\u307e\u3059\u3002\u5ba3\u8a00\u306f\u6b21\u306e\u901a\u308a\u3067\u3059\u3002 char *strstr(const char *haystack, const char *needle); 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