{"id":45640,"date":"2023-03-12T18:55:14","date_gmt":"2023-09-23T08:46:30","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45640-2\/"},"modified":"2024-04-29T18:35:21","modified_gmt":"2024-04-29T10:35:21","slug":"45640-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45640-2\/","title":{"rendered":""},"content":{"rendered":"<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>Rust\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5\u3092\u307e\u3068\u3081\u3066\u307f\u305f\u3002\u7b2c1\u56de\u306e\u7d9a\u304d\u3067\u3059\u3002<\/p>\n<h3>\u76ee\u7684<\/h3>\n<p>Rust\u306b\u304a\u3051\u308b\u57fa\u672c\u7684\u306a\u69cb\u6587\u306e\u7406\u89e3\u3092\u3059\u308b\u3002<br \/>\n\u305d\u308c\u3089\u3092\u6d3b\u7528\u3057\u305f\u30b3\u30fc\u30c9\u306e\u4f5c\u6210\u3002<\/p>\n<h1>Rust\u306e\u57fa\u672c\u69cb\u6587\u30b7\u30ea\u30fc\u30ba<\/h1>\n<p>\u7b2c1\u56de\u21d2Rust\u306e\u57fa\u672c\u69cb\u6587(1)\u3000\u3000URL\uff1ahttps:\/\/qiita.com\/jin237\/items\/b344d3a7e6dfe1056e31<br \/>\n\u7b2c3\u56de\u21d2Rust\u306e\u57fa\u672c\u69cb\u6587(3)\u3000\u3000URL:https:\/\/qiita.com\/jin237\/items\/59ef229a4de30cb8203b<\/p>\n<h1>\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\uff08\u3046\u308b\u3046\u5e74\u3068\u5e73\u5e74\uff09<\/h1>\n<p>from URL: https:\/\/github.com\/ghmagazine\/rustbook\/blob\/master\/ch06\/leap-year\/src\/main.rs<br \/>\n\u3053\u306e\u30b3\u30fc\u30c9\u304c\u57fa\u672c\u7684\u306a\u3053\u3068\u304c\u3044\u308d\u3044\u308d\u3042\u308b\u306e\u3067\u3001\u4f7f\u7528\u3057\u3066\u3044\u304f\u3002\u3053\u308c\u3092\u7d10\u89e3\u304f\u3053\u3068\u3067\u7406\u89e3\u3092\u6df1\u3081\u3066\u3044\u304f\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/ \u5165\u529b\u3055\u308c\u305f\u5e74\u304c\u3046\u308b\u3046\u5e74\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3059\u308b\u30d7\u30ed\u30b0\u30e9\u30e0<\/span>\r\n\r\n<span class=\"c\">\/\/ `std::io` \u540d\u524d\u7a7a\u9593\u3092 `io` \u3068\u3057\u3066\u30a4\u30f3\u30dd\u30fc\u30c8<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"n\">io<\/span><span class=\"p\">;<\/span>\r\n<span class=\"c\">\/\/ `std::io::Write` \u30c8\u30ec\u30a4\u30c8\u3092\u4f7f\u3046<\/span>\r\n<span class=\"k\">use<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"n\">Write<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c\">\/\/ \u30a8\u30f3\u30c8\u30ea\u30dd\u30a4\u30f3\u30c8\u3068\u306a\u308b\u95a2\u6570<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">year<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">String<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nd\">print!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"Please input a year to check if it is a leap year: \"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"nf\">stdout<\/span><span class=\"p\">()<\/span><span class=\"nf\">.flush<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nn\">io<\/span><span class=\"p\">::<\/span><span class=\"nf\">stdin<\/span><span class=\"p\">()<\/span><span class=\"nf\">.read_line<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">year<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">year<\/span> <span class=\"o\">=<\/span> <span class=\"n\">year<\/span><span class=\"nf\">.trim<\/span><span class=\"p\">()<\/span><span class=\"py\">.parse<\/span><span class=\"p\">::<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">u32<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"k\">if<\/span> <span class=\"nf\">is_leap_year<\/span><span class=\"p\">(<\/span><span class=\"n\">year<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{} is a leap year!\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">year<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{} is not a leap year.\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">year<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"c\">\/\/ \u3046\u308b\u3046\u5e74\u306e\u5834\u5408\u306f `true` \u3001\u5e73\u5e74\u306e\u5834\u5408\u306f `false` \u3092\u8fd4\u3059\u95a2\u6570<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">is_leap_year<\/span><span class=\"p\">(<\/span><span class=\"n\">year<\/span><span class=\"p\">:<\/span> <span class=\"nb\">u32<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">bool<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">year<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">4<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"o\">!<\/span><span class=\"p\">(<\/span><span class=\"n\">year<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">100<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"n\">year<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">400<\/span> <span class=\"o\">!=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h1>let\u5f0f(\u30b9\u30b3\u30fc\u30d7\u3001\u30b7\u30e3\u30c9\u30a6\u30a4\u30f3\u30b0\u306a\u3069)<\/h1>\n<h3>\u30b9\u30b3\u30fc\u30d7<\/h3>\n<p>\u7b2c1\u56de\u8a18\u4e8b\u306b\u3066\u3001\u5909\u6570\u5c0e\u5165\u306elet\u6587\u306b\u3064\u3044\u3066\u57fa\u672c\u69cb\u6587\u3068\u30df\u30e5\u30fc\u30bf\u30d3\u30ea\u30c6\u30a3\u306b\u3064\u3044\u3066\u8a18\u8ff0\u3057\u305f\u3002<br \/>\n\u305d\u306e\u5909\u6570\u306b\u306f\u6709\u52b9\u7bc4\u56f2\u304c\u3042\u308b\u3002\u7bc4\u56f2\u306e\u3053\u3068\u3092\u30b9\u30b3\u30fc\u30d7\u3068\u3044\u3046\u3002<\/p>\n<p>\u4f8b\u3092\u5f15\u7528\u3057\u3066\u304f\u308b\u3002(from \u5b9f\u8df5Rust\u5165\u9580\u3000\u8a00\u8a9e\u4ed5\u69d8\u304b\u3089\u958b\u767a\u624b\u6cd5\u307e\u3067 P.224,225-\u4f8b3)<\/p>\n<pre class=\"post-pre\"><code><span class=\"c\">\/\/\u4f8b3<\/span>\r\n<span class=\"c\">\/\/main\u95a2\u6570<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">scope_example<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"c\">\/\/scope\u95a2\u6570<\/span>\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">scope_example<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"mi\">_<\/span><span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"mi\">_<\/span><span class=\"n\">x<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">10<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">y<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">y<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">z<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">z<\/span><span class=\"p\">)<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"mi\">_<\/span><span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5b9f\u884c\u7d50\u679c<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">[Running] cd \"c:\\Users\\[username]\\rust\\project1\\\" &amp;&amp; rustc let_function2.rs &amp;&amp; \"c:\\Users\\[username]\\rust\\project1\\\"let_function2\r\n20\r\n30\r\n10\r\n\r\n[Done] exited with code=0 in 3.721 seconds\r\n<\/span><\/code><\/pre>\n<p>{\u3000}\u3067\u56f2\u307e\u308c\u305f\u90e8\u5206\u304c\u30d6\u30ed\u30c3\u30af\u3068\u547c\u3070\u308c\u308b\u90e8\u5206\u3067\u3042\u308b\u3002\u30d6\u30ed\u30c3\u30af\u3068\u306f{\u3000}\u3067\u56f2\u307e\u308c\u305f\u30d7\u30ed\u30b0\u30e9\u30e0\u8981\u7d20\u306e\u3053\u3068\u3067\u3001\u305d\u306e\u7bc4\u56f2\u5185\u3067\u3057\u304b\u3001\u5909\u6570\u7bc4\u56f2\u306f\u6709\u52b9\u3068\u306a\u3089\u306a\u3044\u3002\u305f\u3060\u3057\u3001\u4e00\u756a\u5916\u5074\uff08\u3060\u3044\u305f\u3044\u95a2\u6570\u306e\u6700\u521d\u304b\u3089\uff09\u3092\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u3068\u547c\u3076\u3002<\/p>\n<h3>\u30b7\u30e3\u30c9\u30a6\u30a4\u30f3\u30b0<\/h3>\n<p>\u4f8b\u3092\u5f15\u7528\u3057\u3066\u304f\u308b\u3002(from \u5b9f\u8df5Rust\u5165\u9580\u3000\u8a00\u8a9e\u4ed5\u69d8\u304b\u3089\u958b\u767a\u624b\u6cd5\u307e\u3067 P.226-\u4f8b4)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">shadowing_example<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">shadowing_example<\/span><span class=\"p\">(){<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"mi\">_<\/span><span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">10<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"mi\">_<\/span><span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span><span class=\"s\">\"String\"<\/span><span class=\"p\">;<\/span>\r\n\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">{<\/span>\r\n            <span class=\"k\">let<\/span> <span class=\"n\">x<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">30<\/span><span class=\"p\">;<\/span>\r\n            <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"p\">}<\/span>\r\n\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">x<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5b9f\u884c\u7d50\u679c<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">[Running] cd \"c:\\Users\\[username]\\rust\\project1\\\" &amp;&amp; rustc let_function3.rs &amp;&amp; \"c:\\Users\\[username]\\rust\\project1\\\"let_function3\r\nString\r\n30\r\nString\r\n\r\n[Done] exited with code=0 in 0.578 seconds\r\n<\/span><\/code><\/pre>\n<p>\u540c\u3058\u5909\u6570\u306b\u5bfe\u3057\u3066\u3001\u4e2d\u8eab\u304c\u9055\u3046\u3082\u306e\u3092\u5165\u308c\u305f\u3068\u304d\u306b\u6700\u5f8c\u306e\u5909\u6570\u306b\u5c0e\u5165\u3055\u308c\u305f\u4e2d\u8eab\u306e\u3082\u306e\u304c\u63a1\u7528\u3055\u308c\u308b\u3002<br \/>\n\u3055\u3089\u306b\u306f\u30d6\u30ed\u30c3\u30af\u5185\u3067\u30b9\u30b3\u30fc\u30d7\u304c\u6c7a\u307e\u3063\u3066\u3044\u308b\u306e\u3067\u3001\u5909\u6570\u8a18\u53f7\u304c\u540c\u4e00\u3067\u3042\u3063\u3066\u3082\u4e2d\u8eab\u306f\u5909\u308f\u3063\u3066\u3057\u307e\u3046\u3002<br \/>\n\u30b7\u30e3\u30c9\u30a6\u30a4\u30f3\u30b0\u3068\u306f\u3001\u524d\u306b\u5c0e\u5165\u3057\u305f\u5909\u6570\u3092\u65b0\u305f\u306b\u5c0e\u5165\u3057\u305f\u5909\u6570\u3067\u96a0\u3057\u3066\u3057\u307e\u3046\u3053\u3068\u3067\u3042\u308a\u3001\u30a4\u30e1\u30fc\u30b8\u3068\u3057\u3066\u306f\u4e0a\u66f8\u304d\u3067\u3044\u3044\u3068\u601d\u3046\u3002<\/p>\n<h1>\u6700\u5f8c\u306b<\/h1>\n<p>\u4eca\u56de\u8f09\u305b\u3066\u3044\u308b\u30b3\u30fc\u30c9\u306b\u3064\u3044\u3066\u3082\u5b9f\u884c\u3067\u304d\u308b\u3001\u307e\u305f\u306f\u3001Warning\u304c\u306a\u3044\u72b6\u614b\u3067\u4f8b\u6587\u3092\u66f8\u304d\u63db\u3048\u305f\u3082\u306e\u3068\u306a\u3063\u3066\u3044\u308b\u3002\u66f8\u7c4d\u305d\u306e\u901a\u308a\u306b\u306f\u66f8\u3044\u3066\u3044\u306a\u3044\u3002\u3053\u306e\u30b3\u30fc\u30c9\u3067\u3057\u3063\u304b\u308a\u3068\u7406\u89e3\u3057\u3066\u307b\u3057\u3044\u3002<br \/>\n\u7591\u554f\u306b\u306a\u308a\u305d\u3046\u306a\u3053\u3068\u306b\u3064\u3044\u3066\uff08\u30a2\u30f3\u30c0\u30fc\u30d0\u30fc\u306e\u3053\u3068\u306a\u3069\uff09\u306f\u5225\u8a18\u4e8b\u3067\u3002<br \/>\nlet\u6587\u306e\u5185\u5bb9\u306b\u3064\u3044\u3066\u306f\u3060\u3044\u305f\u3044\u3053\u308c\u304f\u3089\u3044\u306b\u306a\u308b\u3002\u4eca\u56de\u306f\u300c\u5909\u6570\u300d\u306b\u3064\u3044\u3066\u3060\u3063\u305f\u306e\u3067\u3001\u7b2c3\u56de\u3067\u306f\u300c\u5b9a\u6570\u300d\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u3044\u3053\u3046\u3068\u601d\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b Rust\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5\u3092\u307e\u3068\u3081\u3066\u307f\u305f\u3002\u7b2c1\u56de\u306e\u7d9a\u304d\u3067\u3059\u3002 \u76ee\u7684 Rust\u306b\u304a\u3051\u308b\u57fa\u672c\u7684\u306a\u69cb\u6587\u306e\u7406\u89e3\u3092 [&hellip;]<\/p>\n","protected":false},"author":10,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45640","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>- 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\/45640-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u306f\u3058\u3081\u306b 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