{"id":45655,"date":"2023-04-30T15:18:03","date_gmt":"2022-10-31T17:44:42","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45655-2\/"},"modified":"2024-04-30T01:59:26","modified_gmt":"2024-04-29T17:59:26","slug":"45655-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45655-2\/","title":{"rendered":""},"content":{"rendered":"

\u307e\u3048\u304c\u304d<\/h1>\n

\u3053\u306e\u8a18\u4e8b\u306fRUST\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092Zerobillbank\u793e\u5185\u30e1\u30f3\u30d0\u30fc\uff08\u6709\u5fd7\uff09\u3067\u52c9\u5f37\u304c\u3066\u3089\u3001\u53ef\u80fd\u306a\u9650\u308a\u308f\u304b\u308a\u3084\u3059\u304f\u5185\u5bb9\u3092\u66f8\u304d\u51fa\u3059\u4f01\u753b\u306e\u4e00\u90e8\u3067\u3059\u3002<\/p>\n

\u306a\u304a\u3001\u521d\u5b66\u8005\u306e\u305f\u3081\uff08\u7565\uff09\u3068\u3044\u3046\u514d\u8cac\u3092\u6253\u3061\u3064\u3064\u9593\u9055\u3044\u306a\u3069\u3042\u308c\u3070\u30b3\u30e1\u30f3\u30c8\u3067\u6559\u3048\u3066\u3044\u305f\u3060\u3051\u307e\u3059\u3068\u4e00\u540c\u5b09\u3057\u304f\u601d\u3044\u307e\u3059\uff01<\/p>\n

\u672c\u9805\u306f\u95a2\u6570\u306b\u3064\u3044\u3066\u8a18\u8f09\u3057\u307e\u3059\u3002
\nhttps:\/\/doc.rust-jp.rs\/book\/second-edition\/ch03-03-how-functions-work.html<\/p>\n

\u95a2\u6570\u306e\u52d5\u4f5c\u6cd5<\/h1>\n

\u95a2\u6570\u306e\u547d\u540d\u898f\u5247<\/h2>\n

Rust\u306e\u95a2\u6570\u3068\u5909\u6570\u306e\u547d\u540d\u898f\u5247\u306f\u3001\u30b9\u30cd\u30fc\u30af\u30b1\u30fc\u30b9\u3092\u4f7f\u3046\u306e\u304c\u6163\u4f8b\u3067\u3059\u3002<\/p>\n

fn my_function() {\r\n    println!(\"My Function.\");\r\n}\r\n<\/code><\/pre>\n
\u95a2\u6570\u306e\u5f15\u6570<\/h2>\n
\u95a2\u6570\u5b9a\u7fa9\u3067\u306f\u5f15\u6570\u306e\u578b\u6ce8\u91c8\u304c\u5fc5\u9808\u3067\u3059\u3002<\/p>\n
fn my_function(x: i32) {\r\n    println!(\"The value of x is: {}\", x);\r\n}\r\n<\/code><\/pre>\n
\u623b\u308a\u5024\u306e\u3042\u308b\u95a2\u6570<\/h2>\n
“->”\u306e\u5f8c\u306b\u578b\u3092\u66f8\u304d\u307e\u3059\u3002<\/p>\n
fn five() -> i32 {\r\n    5\r\n}\r\n<\/code><\/pre>\n
\u4e0a\u8a18\u306e\u95a2\u6570\u3067\u306f”return”\u304c\u8a18\u8ff0\u3055\u308c\u3066\u3044\u307e\u305b\u3093\u3002
\nRust\u3067\u306f\u30d6\u30ed\u30c3\u30af\u306e\u6700\u5f8c\u306e\u5f0f\u306e\u5024\u304c\u6697\u9ed9\u7684\u306b\u8fd4\u5374\u3055\u308c\u308b\u305f\u3081\u3001”return”\u306e\u8a18\u8ff0\u304c\u5fc5\u8981\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
“return”\u3067\u623b\u308a\u5024\u306e\u5024\u3092\u6307\u5b9a\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u304c\u3001\u4e0a\u8a18\u306e\u66f8\u304d\u65b9\u304c\u4e00\u822c\u7684\u306a\u3088\u3046\u3067\u3059\u3002<\/p>\n
\u307e\u305f\u3001\u4e0b\u8a18\u306e\u3088\u3046\u306b5\u306e\u5f8c\u308d\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u4ed8\u3051\u305f\u3089\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\uff1f<\/p>\n
fn five() -> i32 {\r\n    5;\r\n}\r\n\r\nerror[E0308]: mismatched types\r\n --> src\/main.rs:6:14\r\n  |\r\n6 | fn five() -> i32 {\r\n  |    ----      ^^^ expected `i32`, found `()`\r\n  |    |\r\n  |    implicitly returns `()` as its body has no tail or `return` expression\r\n7 |     5;\r\n  |      - help: consider removing this semicolon\r\n\r\nerror: aborting due to previous error\r\n\r\nFor more information about this error, try `rustc --explain E0308`.\r\nerror: could not compile `playground`.\r\n\r\nTo learn more, run the command again with --verbose.\r\n<\/code><\/pre>\n
\u4e0a\u8a18\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u306b\u306a\u308a\u307e\u3059\u3002
\n\u884c\u672b\u306b\u30bb\u30df\u30b3\u30ed\u30f3\u3092\u4ed8\u3051\u305f\u5834\u5408\u306b\u5f0f\u306f\u6587\u306b\u5909\u63db\u3055\u308c\u3001\u5024\u3092\u8fd4\u5374\u3057\u306a\u304f\u306a\u308b\u3053\u3068\u304c\u539f\u56e0\u3067\u3059\u3002<\/p>\n
\u3067\u306f\u3001\u5f0f\u3068\u6587\u3068\u306f\u3069\u3046\u3044\u3046\u3082\u306e\u3067\u3057\u3087\u3046\uff1f<\/p>\n
    \n
  • \n
      \u6587<\/ul>\n<\/li>\n<\/ul>\n
      \u306a\u3093\u3089\u304b\u306e\u52d5\u4f5c\u3092\u3057\u3066\u5024\u3092\u8fd4\u3055\u306a\u3044\u547d\u4ee4<\/p>\n
      \u5f0f<\/p>\n
      \u7d50\u679c\u304c\u5024\u306b\u8a55\u4fa1\u3055\u308c\u308b<\/p>\n
      \u6587\u306e\u4f8b<\/p>\n
      let y = 6;  \/\/ let y = 6; \u306fy\u306b6\u3092\u4ee3\u5165\u3057\u3066\u3044\u308b\u3002\u7d50\u679c\u3068\u3057\u3066\u5024\u3092\u8fd4\u3055\u306a\u3044\u547d\u4ee4\u3068\u306a\u308b\r\n<\/code><\/pre>\n
      \u5f0f\u306e\u4f8b<\/p>\n
      {\r\n    let x = 3;\r\n    x + 1 \/\/ \u5f0f\u3068\u306a\u308a4\u3092\u8fd4\u3059\r\n}\r\n<\/code><\/pre>\n
      \u3053\u306e\u3088\u3046\u306b\u3001\u4ed6\u306e\u8a00\u8a9e\u3060\u3068\u3042\u307e\u308a\u898b\u3089\u308c\u306a\u3044;\u306e\u4f7f\u3044\u5206\u3051\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n
      \u3055\u3044\u3054\u306b<\/h2>\n
      ZEROBILLBANK\u3067\u306f\u4e00\u7dd2\u306b\u50cd\u304f\u4ef2\u9593\u3092\u52df\u96c6\u4e2d\u3067\u3059\u3002
      \nZEROBILLBANK JAPAN Inc.<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u307e\u3048\u304c\u304d \u3053\u306e\u8a18\u4e8b\u306fRUST\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092Zerobillbank\u793e\u5185\u30e1\u30f3\u30d0\u30fc\uff08\u6709\u5fd7\uff09\u3067\u52c9\u5f37\u304c\u3066\u3089\u3001\u53ef\u80fd\u306a\u9650 […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45655","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\/zh\/blog\/45655-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u307e\u3048\u304c\u304d \u3053\u306e\u8a18\u4e8b\u306fRUST\u30c1\u30e5\u30fc\u30c8\u30ea\u30a2\u30eb\u3092Zerobillbank\u793e\u5185\u30e1\u30f3\u30d0\u30fc\uff08\u6709\u5fd7\uff09\u3067\u52c9\u5f37\u304c\u3066\u3089\u3001\u53ef\u80fd\u306a\u9650 […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45655-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - 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