{"id":29978,"date":"2024-03-18T23:03:54","date_gmt":"2024-03-18T14:03:54","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/29978-2\/"},"modified":"2024-03-22T22:16:40","modified_gmt":"2024-03-22T13:16:40","slug":"29978-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/29978-2\/","title":{"rendered":""},"content":{"rendered":"

C++\u3067\u306f\u3001ifstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3067\u3059\uff1a<\/p>\n

    \n
  1. \u6700\u521d\u306b\u3001\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n
  2. ifstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u8aad\u307f\u53d6\u308a\u305f\u3044\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304d\u307e\u3059\u3002\u30d5\u30a1\u30a4\u30eb\u540d\u3092\u30b3\u30f3\u30b9\u30c8\u30e9\u30af\u30bf\u306b\u6e21\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\uff1a<\/li>\n<\/ol>\n
    ifstream inputFile<\/span>(\"filename.txt\"<\/span>)<\/span><\/span>;\r\n<\/code><\/pre>\n
    \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u305f\u3081\u306b\u306f\u3001\u30e1\u30f3\u30d0\u30fc\u95a2\u6570open()\u3092\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n
    ifstream inputFile;\r\ninputFile.open<\/span>(\"filename.txt\"<\/span>);\r\n<\/code><\/pre>\n
    \u30d5\u30a1\u30a4\u30eb\u3092\u958b\u304f\u30e2\u30fc\u30c9\u3092\u6307\u5b9a\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001<\/p>\n
    ifstream inputFile<\/span>(\"filename.txt\"<\/span>, ios::in)<\/span><\/span>;\r\n<\/code><\/pre>\n
      \n
    1. \u958b\u3044\u3066\u3044\u307e\u3059\u304b\uff1f<\/li>\n<\/ol>\n
      if<\/span> (inputFile.is_open<\/span>()) {\r\n    \/\/ \u6587\u4ef6\u6210\u529f\u6253\u5f00\uff0c\u53ef\u4ee5\u8bfb\u53d6\u5185\u5bb9<\/span>\r\n} else<\/span> {\r\n    \/\/ \u6587\u4ef6\u6253\u5f00\u5931\u8d25<\/span>\r\n}\r\n<\/code><\/pre>\n
        \n
      1. “I am studying Japanese in order to become fluent.”\u65e5\u672c\u8a9e\u3092\u6d41\u66a2\u306b\u8a71\u305b\u308b\u3088\u3046\u306b\u306a\u308b\u305f\u3081\u306b\u52c9\u5f37\u3057\u3066\u3044\u307e\u3059\u3002<\/li>\n<\/ol>\n
        int<\/span> number;\r\ninputFile >> number;\r\n<\/code><\/pre>\n
        getline()\u30e1\u30f3\u30d0\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u30011\u884c\u306e\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\uff1a<\/p>\n
        string line;\r\ngetline<\/span>(inputFile, line);\r\n<\/code><\/pre>\n
          \n
        1. \u9589\u3058\u308b()<\/li>\n<\/ol>\n
          inputFile.close<\/span>();\r\n<\/code><\/pre>\n
          \u3054\u6ce8\u610f\uff1a<\/p>\n
            \n
          1. ifstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u524d\u306b\u3001\u30d5\u30a1\u30a4\u30eb\u304c\u6b63\u5e38\u306b\u30aa\u30fc\u30d7\u30f3\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u78ba\u8a8d\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n
          2. \u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u969b\u306b\u3001\u30d5\u30a1\u30a4\u30eb\u306e\u672b\u5c3e\u306b\u5230\u9054\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\uff08\u30e1\u30f3\u30d0\u30fc\u95a2\u6570eof()\u3092\u4f7f\u7528\uff09\u3002<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"
            C++\u3067\u306f\u3001ifstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3067\u3059\uff1a \u6700\u521d\u306b\u3001\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u3066\u304f\u3060\u3055\u3044\u3002 ifstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u8aad\u307f\u53d6\u308a\u305f\u3044\u30d5\u30a1\u30a4\u30eb […]<\/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-29978","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\n- 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\/29978-2\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"C++\u3067\u306f\u3001ifstream\u30af\u30e9\u30b9\u3092\u4f7f\u7528\u3057\u3066\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u307f\u307e\u3059\u3002\u4ee5\u4e0b\u306f\u30d5\u30a1\u30a4\u30eb\u3092\u8aad\u307f\u8fbc\u3080\u305f\u3081\u306e\u57fa\u672c\u7684\u306a\u65b9\u6cd5\u3067\u3059\uff1a \u6700\u521d\u306b\u3001\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u3066\u304f\u3060\u3055\u3044\u3002 ifstream\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3057\u3001\u8aad\u307f\u53d6\u308a\u305f\u3044\u30d5\u30a1\u30a4\u30eb […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/29978-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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