{"id":698,"date":"2023-08-31T21:48:39","date_gmt":"2022-08-06T00:01:32","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/index.php\/2023\/11\/30\/%e3%80%8cc%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bexit%e9%96%a2%e6%95%b0%e3%80%8d\/"},"modified":"2025-08-01T01:44:53","modified_gmt":"2025-07-31T16:44:53","slug":"%e3%80%8cc%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bexit%e9%96%a2%e6%95%b0%e3%80%8d","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/%e3%80%8cc%e3%81%ab%e3%81%8a%e3%81%91%e3%82%8bexit%e9%96%a2%e6%95%b0%e3%80%8d\/","title":{"rendered":"\u300cC++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u300d"},"content":{"rendered":"

\u306f\u3058\u3081\u306b<\/h2>\n

\u4eca\u65e5\u306fC++\u306eexit()\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3059\u3002C++\u3067\u306f\u3001\u7d44\u307f\u8fbc\u307f\u306e\u30d6\u30ec\u30a4\u30af\u95a2\u6570\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u304b\u3089\u629c\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u307e\u3059\u3002\u540c\u69d8\u306b\u3001exit()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001C++\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u304b\u3089\u3082\u629c\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u4e2d\u3067\u7d50\u8ad6\u3092\u51fa\u3055\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u72b6\u6cc1\u3092\u8003\u3048\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u304c\u30b3\u30f3\u30d1\u30a4\u30eb\u3084\u8a55\u4fa1\u3055\u308c\u308b\u524d\u306b\u7d50\u679c\u3092\u5f97\u3066\u3001\u4f55\u304b\u3092\u7d50\u8ad6\u3057\u307e\u3059\u3002<\/p>\n

\u5fc5\u8981\u306a\u60c5\u5831\u3084\u7d50\u679c\u3092\u5f97\u305f\u3089\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u3059\u3050\u306b\u7d42\u4e86\u3059\u308b\u65b9\u6cd5\u306f\u4f55\u3067\u3059\u304b\uff1f<\/p>\n

\u4e0a\u8a18\u306e\u8cea\u554f\u306b\u5bfe\u3059\u308b\u7b54\u3048\u306f\u3001C++\u306e\u7d44\u307f\u8fbc\u307f\u306eexit\uff08\uff09\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3067\u3059\u3002\u3067\u306f\u3001\u3053\u306e\u95a2\u6570\u3068\u305d\u306e\u52d5\u4f5c\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n

C++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u306e\u5b9a\u7fa9<\/h2>\n
\"Flow<\/div>\n

\u7406\u8ad6\u7684\u306b\u306f\u3001C++\u306eexit()\u95a2\u6570\u306f\u3001\u30d7\u30ed\u30b0\u30e9\u30e0\u30ea\u30b9\u30c8\u5185\u306e\u3069\u3053\u306b\u73fe\u308c\u3066\u3082\u3059\u3050\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7d42\u4e86\u3055\u305b\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306f\u3001stdlib.h\u306e\u30d8\u30c3\u30c0\u30fc\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u5b9a\u7fa9\u3055\u308c\u3066\u304a\u308a\u3001exit()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u969b\u306b\u306f\u3053\u306e\u30d5\u30a1\u30a4\u30eb\u3092\u542b\u3081\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

C++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u306e\u69cb\u6587<\/h2>\n

exit()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u305f\u3081\u306e\u6587\u6cd5\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n

exit<\/span>(<\/span> exit_value )<\/span>;<\/span>\r\n<\/code><\/pre>\n
\u6210\u529f\u7684\u306b\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u7d42\u4e86\u3057\u305f\u5f8c\u3001exit_value\u306f\u64cd\u4f5c\u30b7\u30b9\u30c6\u30e0\u306b\u6e21\u3055\u308c\u308b\u5024\u3067\u3059\u3002\u3053\u306e\u5024\u306f\u3001ERROR LEVEL\u304cexit()\u95a2\u6570\u306b\u3088\u3063\u3066\u8fd4\u3055\u308c\u308b\u8fd4\u308a\u5024\u3092\u793a\u3059\u30d0\u30c3\u30c1\u30d5\u30a1\u30a4\u30eb\u3067\u30c6\u30b9\u30c8\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u3001\u50240\u306f\u6b63\u5e38\u306a\u7d42\u4e86\u3092\u793a\u3057\u3001\u4ed6\u306e\u6570\u5024\u306f\u30a8\u30e9\u30fc\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n
C++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u306e\u52d5\u4f5c<\/h2>\n
\u899a\u3048\u3066\u304a\u3044\u3066\u304f\u3060\u3055\u3044\u3001exit()\u95a2\u6570\u306f\u5e38\u306b\u5024\u3092\u8fd4\u3057\u307e\u305b\u3093\u3002\u305d\u308c\u306f\u30d7\u30ed\u30bb\u30b9\u3092\u7d42\u4e86\u3057\u3001\u7d42\u4e86\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u901a\u5e38\u306e\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3092\u884c\u3044\u307e\u3059\u3002<\/p>\n
\u307e\u305f\u3001C++\u3067\u3053\u306e\u95a2\u6570\u3092\u547c\u3073\u51fa\u3057\u3066\u3082\u81ea\u52d5\u7684\u306a\u8a18\u61b6\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306f\u7834\u68c4\u3055\u308c\u307e\u305b\u3093\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u4f8b\u3092\u6ce8\u610f\u6df1\u304f\u898b\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
#<\/span>include<\/span><iostream><\/span><\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>\r\n\tint<\/span> i;<\/span>\r\n\tcout<<<\/span>\"Enter a non-zero value: \"<\/span>;<\/span>  \/\/user input<\/span>\r\n\tcin>><\/span>i;<\/span>\r\n\tif<\/span>(<\/span>i)<\/span>    \/\/ checks whether the user input is non-zero or not<\/span>\r\n\t{<\/span>\r\n\t\tcout<<<\/span>\"Valid input.\\n\"<\/span>;<\/span>\r\n\t}<\/span>\r\n\telse<\/span>\r\n\t{<\/span>\r\n\t\tcout<<<\/span>\"ERROR!\"<\/span>;<\/span>  \/\/the program exists if the value is 0<\/span>\r\n\t\texit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>\r\n\t}<\/span>\r\n\tcout<<<\/span>\"The input was : \"<\/span><<<\/span>i;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
\u51fa\u529b\uff1a<\/p>\n
Enter a non-<\/span>zero value:<\/span> 0<\/span>\r\nERROR!<\/span>\r\n<\/code><\/pre>\n
    \n
  • Since the user input for the above code provided is zero(0), the else part is executed for the if-else statement. Further where the compiler encounters the exit() function and terminates the program.<\/li>\n
  • Even the print statement below the if-else is not executed since the program has been terminated by the exit() function already.<\/li>\n<\/ul>\n
    \u3067\u306f\u3001\u5225\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u6570\u304c\u7d20\u6570\u304b\u3069\u3046\u304b\u3092\u5224\u5b9a\u3057\u3088\u3046\u3068\u3059\u308b\u5834\u5408\u3067\u3059\u3002<\/p>\n
    C++\u306eexit()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b<\/h2>\n
    \u4ee5\u4e0b\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001exit() \u95a2\u6570\u306e\u4f7f\u7528\u4f8b\u3092\u793a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
    #<\/span>include<\/span><iostream><\/span><\/span>\r\nusing<\/span> namespace<\/span> std;<\/span>\r\nint<\/span> main<\/span>(<\/span>)<\/span>\r\n{<\/span>\r\n\tint<\/span> i,<\/span>num;<\/span>\r\n\tcout<<<\/span>\"Enter the number : \"<\/span>;<\/span>\r\n\tcin>><\/span>num;<\/span>\r\n\tfor<\/span>(<\/span>i=<\/span>2<\/span>;<\/span>i<=<\/span>num\/<\/span>2<\/span>;<\/span>i++<\/span>)<\/span>\r\n\t{<\/span>\r\n\t\tif<\/span>(<\/span>num%<\/span>i==<\/span>0<\/span>)<\/span>\r\n\t\t{<\/span>\r\n\t\t\tcout<<<\/span>\"\\nNot a prime number!\"<\/span>;<\/span>\r\n\t\t\texit<\/span>(<\/span>0<\/span>)<\/span>;<\/span>\r\n\t\t}<\/span>\r\n\t}<\/span>\r\n\tcout<<<\/span>\"\\nIt is a prime number!\"<\/span>;<\/span>\r\n\treturn<\/span> 0<\/span>;<\/span>\r\n}<\/span>\r\n<\/code><\/pre>\n
    \u51fa\u529b\uff1a<\/p>\n
    \"Exit<\/div>\n
    \u4e0a\u8a18\u306e\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8ff0\u3079\u308b\u3068\u3001<\/p>\n
      \n
    • firstly we took a user input for the number. We need to check whether this number,num is prime or not.<\/li>\n
    • After that, we apply a for loop which works from 2 to n\/2. This is because we already know that all numbers are divisible by 1 as well as a number is indivisible by numbers above its half.<\/li>\n
    • Inside the for loop, we check whether the number is divisible by the loop iterator at that instant. If so, we can directly conclude that the number is not prime and terminate the program using the exit() function,<\/li>\n
    • Else, the loop goes on checking. After the execution of the whole loop structure, we declare the number as a prime one.<\/li>\n<\/ul>\n
      \u7d50\u8ad6\u306f\u6b21\u306e\u3088\u3046\u306b\u8a00\u3048\u307e\u3059\u3002<\/h2>\n
      \u3053\u306e\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3067\u306f\u3001C++\u306e\u7d44\u307f\u8fbc\u307f\u306eexit()\u95a2\u6570\u306e\u52d5\u4f5c\u3068\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3057\u305f\u3002\u3053\u308c\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u5b9f\u884c\u3092\u7d42\u4e86\u3059\u308b\u305f\u3081\u306b\u5e83\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n
      \u8cea\u554f\u304c\u3042\u308c\u3070\u3001\u4e0b\u306b\u30b3\u30e1\u30f3\u30c8\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n
      \u53c2\u8003\u8cc7\u6599<\/h2>\n
        \n
      • https:\/\/stackoverflow.com\/questions\/461449\/return-statement-vs-exit-in-main<\/li>\n
      • \/community\/tutorials\/c-plus-plus<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
        \u306f\u3058\u3081\u306b \u4eca\u65e5\u306fC++\u306eexit()\u306b\u3064\u3044\u3066\u5b66\u3073\u307e\u3059\u3002C++\u3067\u306f\u3001\u7d44\u307f\u8fbc\u307f\u306e\u30d6\u30ec\u30a4\u30af\u95a2\u6570\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u304b\u3089\u629c\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3053\u3068\u3092\u77e5\u3063\u3066\u3044\u307e\u3059\u3002\u540c\u69d8\u306b\u3001exit()\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u3068\u3001C++\u30d7\u30ed\u30b0\u30e9\u30e0\u5168\u4f53\u304b\u3089\u3082\u629c\u3051\u308b\u3053\u3068\u304c […]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[26,61],"class_list":["post-698","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-26","tag-61"],"yoast_head":"\n\u300cC++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u300d - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"\u300cC++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u300d\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\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\/\u300cc\u306b\u304a\u3051\u308bexit\u95a2\u6570\u300d\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u300cC++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u300d\" \/>\n<meta property=\"og:description\" content=\"\u300cC++\u306b\u304a\u3051\u308bexit()\u95a2\u6570\u300d\u3092\u5206\u304b\u308a\u3084\u3059\u304f\u89e3\u8aac\u3002\u5b9f\u8df5\u7684\u306a\u4f8b\u3068\u30b3\u30fc\u30c9\u3001\u6ce8\u610f\u70b9\u3092\u542b\u3081\u3066\u521d\u5fc3\u8005\u306b\u3082\u7406\u89e3\u3067\u304d\u308b\u3088\u3046\u8aac\u660e\u3057\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/ja\/blog\/\u300cc\u306b\u304a\u3051\u308bexit\u95a2\u6570\u300d\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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