{"id":119764,"date":"2024-03-23T19:49:43","date_gmt":"2024-03-23T10:49:43","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bsizeof%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/"},"modified":"2024-04-05T05:18:34","modified_gmt":"2024-04-04T20:18:34","slug":"c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bsizeof%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/c%e8%a8%80%e8%aa%9e%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bsizeof%e3%81%ae%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95\/","title":{"rendered":"C\u8a00\u8a9e\u306b\u304a\u3051\u308bsizeof\u306e\u4f7f\u7528\u65b9\u6cd5"},"content":{"rendered":"

C\u8a00\u8a9e\u3067\u306f\u3001sizeof\u306f\u5909\u6570\u3084\u578b\u306e\u5360\u6709\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u6f14\u7b97\u5b50\u3067\u3059\u3002sizeof\u306f\u4ee5\u4e0b\u306e\u7528\u9014\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002<\/p>\n

    \n
  1. \u6307\u5b9a\u306e\u30c7\u30fc\u30bf\u578b\u306e\u30e1\u30e2\u30ea\u5185\u306e\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001sizeof(int) \u306f\u6574\u578b\u5909\u6570\u304c\u30e1\u30e2\u30ea\u5185\u3067\u5360\u3081\u308b\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n
  2. \u5909\u6570\u306e\u30b5\u30a4\u30ba\uff08\u30d0\u30a4\u30c8\u6570\uff09\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u5909\u6570num\u306e sizeof(num) \u306f\u3001num\u304c\u30e1\u30e2\u30ea\u5185\u3067\u5360\u3081\u308b\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n
  3. sizeof \u6f14\u7b97\u5b50\uff1a \u6307\u5b9a\u3055\u308c\u305f\u5f0f\u306e\u8a55\u4fa1\u7d50\u679c\u304c\u5360\u3081\u308b\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001sizeof(num + 1) \u306f num + 1 \u5f0f\u306e\u8a55\u4fa1\u7d50\u679c\u304c\u30e1\u30e2\u30ea\u4e0a\u3067\u5360\u3081\u308b\u30d0\u30a4\u30c8\u6570\u3092\u8fd4\u3057\u307e\u3059\u3002<\/li>\n<\/ol>\n

    sizeof\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u306b\u8a55\u4fa1\u3055\u308c\u307e\u3059\u3002\u5b9f\u884c\u6642\u306b\u8a55\u4fa1\u3055\u308c\u308b\u308f\u3051\u3067\u306f\u306a\u3044\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u305f\u3081\u3001sizeof\u306e\u7d50\u679c\u306f\u30b3\u30f3\u30d1\u30a4\u30eb\u6642\u3067\u6c7a\u307e\u308b\u5b9a\u6570\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

    \u4ee5\u4e0b\u306b\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n

    #include <stdio.h>\r\nint main() {\r\nint num = 10;\r\nint arr[5] = {1, 2, 3, 4, 5};\r\nprintf(\"sizeof(int): %zu\\n\", sizeof(int));\r\nprintf(\"sizeof(num): %zu\\n\", sizeof(num));\r\nprintf(\"sizeof(arr): %zu\\n\", sizeof(arr));\r\nprintf(\"sizeof(arr[0]): %zu\\n\", sizeof(arr[0]));\r\nprintf(\"sizeof(num + 1): %zu\\n\", sizeof(num + 1));\r\nreturn 0;\r\n}\r\n<\/code><\/pre>\n
    \u7d50\u679c\u3092\u51fa\u529b\u3059\u308b\uff1a<\/p>\n
    sizeof(int): 4\r\nsizeof(num): 4\r\nsizeof(arr): 20\r\nsizeof(arr[0]): 4\r\nsizeof(num + 1): 4\r\n<\/code><\/pre>\n
    int \u578b\u306f\u30e1\u30e2\u30ea\u4e2d\u3067 4 \u30d0\u30a4\u30c8\u3092\u5360\u3081\u3001\u5909\u6570 num \u306f 4 \u30d0\u30a4\u30c8\u3001\u914d\u5217 arr \u306f 20 \u30d0\u30a4\u30c8\uff08\u8981\u7d20\u306e int \u306f 4 \u30d0\u30a4\u30c8\u3067\u3001\u8981\u7d20\u306f 5 \u3064\uff09\u3001\u914d\u5217\u306e\u8981\u7d20 arr[0] \u306f 4 \u30d0\u30a4\u30c8\u3001num + 1 \u306f 4 \u30d0\u30a4\u30c8\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    C\u8a00\u8a9e\u3067\u306f\u3001sizeof\u306f\u5909\u6570\u3084\u578b\u306e\u5360\u6709\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u6f14\u7b97\u5b50\u3067\u3059\u3002sizeof\u306f\u4ee5\u4e0b\u306e\u7528\u9014\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u6307\u5b9a\u306e\u30c7\u30fc\u30bf\u578b\u306e\u30e1\u30e2\u30ea\u5185\u306e\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001sizeof(int) \u306f\u6574\u578b\u5909\u6570\u304c\u30e1\u30e2\u30ea\u5185\u3067 […]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-119764","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"\nC\u8a00\u8a9e\u306b\u304a\u3051\u308bsizeof\u306e\u4f7f\u7528\u65b9\u6cd5 - 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\/c\u8a00\u8a9e\u306b\u304a\u3051\u308bsizeof\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"C\u8a00\u8a9e\u306b\u304a\u3051\u308bsizeof\u306e\u4f7f\u7528\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"C\u8a00\u8a9e\u3067\u306f\u3001sizeof\u306f\u5909\u6570\u3084\u578b\u306e\u5360\u6709\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3059\u308b\u305f\u3081\u306e\u6f14\u7b97\u5b50\u3067\u3059\u3002sizeof\u306f\u4ee5\u4e0b\u306e\u7528\u9014\u306b\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002 \u6307\u5b9a\u306e\u30c7\u30fc\u30bf\u578b\u306e\u30e1\u30e2\u30ea\u5185\u306e\u30d0\u30a4\u30c8\u6570\u3092\u53d6\u5f97\u3057\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001sizeof(int) \u306f\u6574\u578b\u5909\u6570\u304c\u30e1\u30e2\u30ea\u5185\u3067 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/c\u8a00\u8a9e\u306b\u304a\u3051\u308bsizeof\u306e\u4f7f\u7528\u65b9\u6cd5\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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