{"id":45473,"date":"2024-01-01T01:26:32","date_gmt":"2023-04-09T10:33:51","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45473-2\/"},"modified":"2024-05-04T16:14:13","modified_gmt":"2024-05-04T08:14:13","slug":"45473-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45473-2\/","title":{"rendered":""},"content":{"rendered":"<h1>\u306f\u3058\u3081\u306b<\/h1>\n<p>Rust\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u305f\u3002\u7b2c5\u56de\uff01<br \/>\n\u4eca\u56de\u304b\u3089\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u69cb\u6587\u3068\u3057\u3066\u3001\u69d8\u3005\u306a\u3053\u3068\u306b\u4f7f\u308f\u308c\u308b\u300c\u5206\u5c90\u300d\u306b\u3064\u3044\u3066\u3002<br \/>\nC\/C++, python ,java, ruby\u306a\u3069\u3067\u3082\u591a\u304f\u306b\u4f7f\u308f\u308c\u308b\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<\/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\u7b2c2\u56de\u21d2Rust\u306e\u57fa\u672c\u69cb\u6587(2)\u3000\u3000URL\uff1a https:\/\/qiita.com\/jin237\/items\/6910b4f803a35f317213<br \/>\n\u7b2c3\u56de\u21d2Rust\u306e\u57fa\u672c\u69cb\u6587(3)\u3000\u3000URL\uff1ahttps:\/\/qiita.com\/jin237\/items\/59ef229a4de30cb8203b<br \/>\n\u7b2c4\u56de\u21d2Rust\u306e\u57fa\u672c\u69cb\u6587(4)\u3000\u3000URL\uff1a https:\/\/qiita.com\/jin237\/items\/42249f984746711be0e2<\/p>\n<h1>\u6f14\u7b97\u5b50<\/h1>\n<p>\u5148\u306b\u6f14\u7b97\u5b50\u306b\u3064\u3044\u3066\u8efd\u304f\u307e\u3068\u3081\u3066\u304a\u304f\u3002\u4ed6\u306e\u8a00\u8a9e\u306b\u304a\u3051\u308b\u6f14\u7b97\u8a18\u53f7\u306a\u3069\u3068\u307b\u307c\u307b\u307c\u4e00\u7dd2\u3067\u3042\u308b\u3002<\/p>\n<h3>\u56db\u5247\u6f14\u7b97\u306b\u95a2\u3057\u3066<\/h3>\n<p>\u30fb&#8221;+&#8221;\u306f\u52a0\u6cd5(\u8db3\u3057\u7b97)\u3092\u793a\u3059\u3002<br \/>\n\u30fb&#8221;-&#8220;\u306f\u6e1b\u6cd5(\u5f15\u304d\u7b97)\u3092\u793a\u3059\u3002<br \/>\n\u30fb&#8221;*&#8221;\u306f\u4e57\u6cd5(\u639b\u3051\u7b97)\u3092\u793a\u3059\u3002<br \/>\n\u30fb&#8221;\/&#8221;\u306f\u9664\u6cd5(\u5272\u308a\u7b97)\u3092\u793a\u3059\u3002<br \/>\n\u3053\u3053\u3067\u3001\u8a08\u7b97\u30d7\u30ed\u30b0\u30e9\u30e0\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3042\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">answer<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">70<\/span> <span class=\"o\">+<\/span> <span class=\"mf\">8.9<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"70 + 8.9 = {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">answer<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u3068\u3044\u3046\u7c21\u5358\u305d\u3046\u306a\u8a08\u7b97\u3067\u3082\u3053\u306e\u30b3\u30fc\u30c9\u3060\u3068\u4e0b\u8a18\u306e\u3088\u3046\u306a\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u304f\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">[Running] cd \"c:\\Users\\[username]\\rust\\project1\\\" &amp;&amp; rustc culc1.rs &amp;&amp; \"c:\\Users\\[username]\\rust\\project1\\\"culc1\r\nerror[E0277]: cannot add a float to an integer\r\n<\/span><span class=\"gp\"> --&gt;<\/span> culc1.rs:2:21\r\n<span class=\"go\">  |\r\n<\/span><span class=\"gp\">2 |     let answer = 70 + 8.9;<\/span>\r\n<span class=\"go\">  |                     ^ no implementation for `{integer} + {float}`\r\n  |\r\n<\/span><span class=\"gp\">  = help: the trait `std::ops::Add&lt;{float}&gt;<\/span><span class=\"sb\">`<\/span> is not implemented <span class=\"k\">for<\/span> <span class=\"sb\">`<\/span><span class=\"o\">{<\/span>integer<span class=\"o\">}<\/span><span class=\"sb\">`<\/span>\r\n<span class=\"go\">error: aborting due to previous error\r\nFor more information about this error, try `rustc --explain E0277`.\r\n<\/span><\/code><\/pre>\n<p>\u3053\u308c\u306f\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570\u306b\u305d\u308d\u3048\u308b\u3053\u3068\u306b\u3088\u308a\u30a8\u30e9\u30fc\u306e\u89e3\u6d88\u304c\u3067\u304d\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">answer<\/span> <span class=\"o\">=<\/span> <span class=\"mf\">70.0<\/span> <span class=\"o\">+<\/span> <span class=\"mf\">8.9<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"70.0 + 8.9 = {}\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">answer<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30b3\u30fc\u30c9\u3067\u3057\u3063\u304b\u308a\u3068\u52d5\u304f\u3002<br \/>\n\u3053\u308c\u306b\u306f\u6c17\u3092\u4ed8\u3051\u305f\u3044\u3002<\/p>\n<h1>if\u5f0f\u306b\u3088\u308b\u5206\u5c90(\u57fa\u790e\u69cb\u6587)<\/h1>\n<p>\u57fa\u790e\u7684\u306a\u69cb\u6587\u306b\u3064\u3044\u3066\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u66f8\u304d\u65b9\u3068\u306a\u308b\u3002(\u307b\u304b\u306e\u8a00\u8a9e\u3068\u4f3c\u3066\u3044\u308b)<\/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.230-\u4f8b1)<\/p>\n<h3>\u57fa\u672c\u3068\u306a\u308b\u69cb\u6587(\u4f8b1)<\/h3>\n<pre class=\"post-pre\"><code>if \u6761\u4ef6\u5f0f{\r\n     \u6761\u4ef6\u304ctrue\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u7bc0(true\u7bc0)\r\n} else {\r\n     \u6761\u4ef6\u304cfalse\u306e\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b\u7bc0(false\u7bc0)\r\n}\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n  <span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">11<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">if<\/span> <span class=\"n\">a<\/span> <span class=\"o\">%<\/span><span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"p\">{<\/span>\r\n      <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{} is an even number\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/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 an odd number\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u7d50\u679c\u304c\u4e0b\u8a18<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">11 is an odd number\r\n\r\n[Done] exited with code=0 in ____ seconds\r\n<\/span><\/code><\/pre>\n<p>\u306e\u3088\u3046\u306b\u3001a=11\u3068\u304a\u3044\u3066\u6570\u306b\u5bfe\u3057\u3066\u3001\u5076\u6570\u3068\u5947\u6570\u306e\u5224\u5b9a\u304c\u3067\u304d\u308b\u3002\u3053\u308c\u306f\u3069\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u8a00\u8a9e\u3067\u3082\u540c\u3058\u3088\u3046\u306b\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3061\u306a\u307f\u306b\u3001&#8221;even number&#8221;\u304c\u5076\u6570\u3001&#8221;odd number&#8221;\u304c\u5947\u6570\u3068\u306a\u308b\u3002<br \/>\n\u4ed6\u8a00\u8a9e\u3060\u3068\u4e0a\u306e\u3088\u3046\u306b\u66f8\u304f\u69d8\u5f0f\u304c\u591a\u3044\u304c\u3001\u3042\u304f\u307e\u3067\u3001if \u6761\u4ef6\u5f0f\u306a\u306e\u3067\u3001\u5f0f\u3067\u8868\u3059\u3053\u3068\u3082\u3067\u304d\u308b\u3002<br \/>\n\u66f8\u304d\u65b9\u3092\u5909\u3048\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3082\u3067\u304d\u308b\u3002<\/p>\n<h3>\u4f8b1\u306e\u66f8\u304d\u63db\u3048(\u4f8b2)<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">11<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">even_or_odd<\/span> <span class=\"o\">=<\/span> <span class=\"k\">if<\/span> <span class=\"n\">a<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"an even\"<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"an odd\"<\/span>\r\n    <span class=\"p\">};<\/span>\r\n\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{} is {} number\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"p\">,<\/span> <span class=\"n\">even_or_odd<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u306f\u3001\u5909\u6570a\u306e11(\u5947\u6570)\u306b\u3088\u3063\u3066even_or_odd\u5909\u6570\u304c&#8221;an odd&#8221;\u306b\u675f\u7e1b\u3055\u308c\u308b\u3002\u3053\u308c\u3088\u308a\u3001\u7d50\u679c\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">11 is an odd number   \/\/result\r\n<\/span><\/code><\/pre>\n<p>\u3053\u3053\u3067\u6ce8\u610f\u304c\u5fc5\u8981\u306a\u306e\u304c\u3001if\u5f0f\u306b\u306f\u623b\u308a\u5024\u304c\u5b58\u5728(\u4eca\u56de\u306e\u5834\u5408\u306f()\u3068\u306a\u308b)\u3057\u3001true\u7bc0\u3001false\u7bc0\u306e\u3069\u3061\u3089\u3082\u623b\u308a\u5024\u306e\u578b\u306f\u540c\u69d8\u3067\u306a\u3044\u3068\u3044\u3051\u306a\u3044\u3068\u3044\u3046\u3053\u3068\u3002\u3061\u306a\u307f\u306b\u4f8b1\u3067\u306eif\u5f0f\u306e\u5f8c\u306b&#8221;;&#8221;\u304c\u306a\u3044\u304c\u3053\u308c\u306f\u30df\u30b9\u3067\u306f\u306a\u304f\u623b\u308a\u5024\u304c&#8221;()&#8221;\u306e\u5834\u5408\u306b\u306f\u7279\u4f8b\u306b\u3088\u3063\u3066\u7701\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h3>if\u5f0f\u3067\u3067\u304d\u306a\u3044\u3053\u3068<\/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.232-\u4f8b3)<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">(){<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">13<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"k\">let<\/span> <span class=\"n\">result<\/span> <span class=\"o\">=<\/span> <span class=\"k\">if<\/span> <span class=\"n\">a<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"p\">{<\/span>\r\n        <span class=\"sc\">'E'<\/span>\r\n    <span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"AN ODD\"<\/span>\r\n    <span class=\"p\">};<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3068\u3044\u3046\u51e6\u7406\u3092\u884c\u3046\u3002\u3053\u308c\u306f\u3001<br \/>\ntrue\u51e6\u7406\u21d2char\u578b<br \/>\nfalse\u51e6\u7406\u21d2str\u578b<br \/>\n\u3068\u3044\u3046\u51e6\u7406\u3092\u884c\u3063\u3066\u3044\u307e\u3059\u304c\u3001result\u5909\u6570\u3067\u306e\u578b\u306e\u78ba\u5b9a\u304c\u3067\u304d\u306a\u3044\u3002rust\u306eif\u5f0f\u306b\u304a\u3044\u3066\u3053\u3046\u3044\u3063\u305f\u4f7f\u3044\u65b9\u306f\u3067\u304d\u306a\u3044\u3002\u524d\u8ff0\u306b\u8ffd\u8a18\u3057\u3066\u3001\u623b\u308a\u5024\u306e\u578b\u3082\u540c\u3058\u3067\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u3088\u3063\u3066\u4e0b\u8a18\u306e\u3088\u3046\u306aError\u304c\u8d77\u3053\u3063\u3066\u3057\u307e\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"go\">[Running] cd \"c:\\Users\\[username]\\rust\\project1\\\" &amp;&amp; rustc even_or_odd.rs &amp;&amp; \"\r\n[Running] cd \"c:\\Users\\[username]\\rust\\project1\\\" &amp;&amp; rustc if_function.rs &amp;&amp; \"c:\\Users\\[username]\\rust\\project1\\\"if_function\r\nerror[E0308]: if and else have incompatible types\r\n<\/span><span class=\"gp\"> --&gt;<\/span> if_function.rs:7:9\r\n<span class=\"go\">  |\r\n4 |       let result = if a % 2 == 0{\r\n  |  __________________-\r\n5 | |         'E'\r\n  | |         --- expected because of this\r\n6 | |     } else {\r\n7 | |         \"AN ODD\"\r\n  | |         ^^^^^^^^ expected char, found &amp;str\r\n<\/span><span class=\"gp\">8 | |     };<\/span>\r\n<span class=\"go\">  | |_____- if and else have incompatible types\r\n  |\r\n  = note: expected type `char`\r\n             found type `&amp;str`\r\n<\/span><\/code><\/pre>\n<h3>\u8ffd\u8a18<\/h3>\n<p>if\u5f0f\u306b\u304a\u3044\u3066\u3001true\u7bc0\u306e\u307f\u3067\u623b\u308a\u5024\u304c&#8221;()&#8221;\u3068\u306a\u308b\u5834\u5408\u3001false\u7bc0\u3092\u7701\u3044\u3066\u3082\u3001false\u306e\u623b\u308a\u5024\u304c&#8221;()&#8221;\u3068\u306a\u308b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">let<\/span> <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">11<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">if<\/span> <span class=\"n\">a<\/span> <span class=\"o\">%<\/span> <span class=\"mi\">2<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;{<\/span>\r\n    <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{} is an odd number\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3068\u3082\u8a18\u8ff0\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002<\/p>\n<h1>\u3055\u3044\u3054\u306b<\/h1>\n<p>if\u5f0f\u306b\u3064\u3044\u3066\u306e\u8a18\u4e8b\u3092\u66f8\u3044\u3066\u307f\u305f\u3002\u591a\u5c11\u9593\u9055\u3063\u3066\u3044\u308b\u3068\u3053\u308d\u3082\u3042\u308b\u304b\u3082\u3057\u308c\u306a\u3044\u306e\u3067\u3001\u305c\u3072\u6307\u6458\u3057\u3066\u307b\u3057\u3044\u3002if\u306e\u307b\u304b\u306b\u3082\u5206\u5c90\u3055\u305b\u308b\u3082\u306e\u306f\u3042\u308b\u306e\u3067\u6b21\u56de\u8a18\u8f09\u3059\u308b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u306f\u3058\u3081\u306b Rust\u306e\u57fa\u672c\u7684\u306a\u6587\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u3066\u307f\u305f\u3002\u7b2c5\u56de\uff01 \u4eca\u56de\u304b\u3089\u306f\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u69cb\u6587\u3068\u3057\u3066\u3001\u69d8\u3005\u306a\u3053\u3068\u306b [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45473","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\/45473-2\/\" \/>\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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