{"id":45752,"date":"2022-12-27T02:04:22","date_gmt":"2023-03-01T21:46:42","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45752-2\/"},"modified":"2024-04-29T07:07:33","modified_gmt":"2024-04-28T23:07:33","slug":"45752-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45752-2\/","title":{"rendered":""},"content":{"rendered":"<h2>\u80cc\u666f<\/h2>\n<p>Rust\u306f\u3057\u3070\u3057\u3070C\u3084C++\u8a00\u8a9e\u3068\u6bd4\u8f03\u3055\u308c\u308b\u8a18\u4e8b\u304c\u898b\u3089\u308c\u3001\u5b9f\u969b\u306b\u3001\u3088\u308a\u958b\u767a\u304c\u3057\u3084\u3059\u3044\u3088\u3046\u306a\u6a5f\u80fd\u304c\u591a\u3005\u5165\u3063\u3066\u3044\u308b\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u79c1\u304c\u4ee5\u524d\u696d\u52d9\u3067\u4f7f\u7528\u3057\u3066\u3044\u305fC\u3068\u6bd4\u8f03\u3057\u3066\u3001\u3053\u306e\u70b9\u306f\u3001\u5b9f\u969b\u306bRust\u3092\u89e6\u3063\u3066\u307f\u3066\u826f\u304b\u3063\u305f\u306a\u3068\u601d\u3063\u305f\u70b9\u3092\u304a\u4f1d\u3048\u3057\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\n\u305f\u3060\u3001\u3069\u3061\u3089\u304b\u3068\u3044\u3046\u3068\u3001Rust\u3068\u3044\u3046\u3088\u308a\u3001\u3042\u307e\u308a\u610f\u8b58\u3057\u306a\u304f\u3066\u3082\u66f8\u3051\u308b\u3053\u3068\u306f\u7d20\u6674\u3089\u3057\u3044\u3068\u3044\u3046\u8a71\u306b\u306a\u308b\u306f\u305a&#8230;<\/p>\n<hr \/>\n<h2>C\u306b\u3064\u3044\u3066<\/h2>\n<p>C\u306f\u8a00\u308f\u305a\u3082\u304c\u306a\u3001\u4eca\u3067\u3082\u4f4e\u30ec\u30a4\u30e4\u30fc\u3092\u6271\u3063\u305f\u308a\u3059\u308b\u3068\u304d\u306b\u7528\u3044\u3089\u308c\u308b\u3053\u3068\u3082\u3042\u308b\u8a00\u8a9e\u3067\u3059\uff08\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u3001OS\u306a\u3069\uff09\u3002\u307e\u305f\u3001\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u3067\u3082\u6d3b\u8e8d\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u30de\u30eb\u30c1\u30d7\u30e9\u30c3\u30c8\u30d5\u30a9\u30fc\u30e0\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u74b0\u5883\u306b\u4f9d\u5b58\u305b\u305a\u306b\u5b9f\u884c\u3067\u304d\u3001\u5b9f\u884c\u901f\u5ea6\u304c\u901f\u3044\u3053\u3068\u304c\u7279\u5fb4\u3068\u3057\u3066\u6319\u3052\u3089\u308c\u307e\u3059\u3002<br \/>\n\u305f\u3060\u3057\u3001\u30e1\u30e2\u30ea\u3092\u6271\u3046\u3053\u3068\u304c\u591a\u3044\u305f\u3081\u3001\u7fd2\u5f97\u96e3\u6613\u5ea6\u306f\u3084\u3084\u9ad8\u3081\u3068\u3055\u308c\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u3002<\/p>\n<hr \/>\n<h2>\u6bd4\u8f03<\/h2>\n<p>Rust\u306e\u6982\u5ff5\u3068\u3057\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5b89\u5168\u6027<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u4e26\u884c\u6027<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u901f\u5ea6<\/ul>\n<p>\u4eca\u56de\u306f\u3001\u5b89\u5168\u6027\u306e\u90e8\u5206\u3092\u4e2d\u5fc3\u306b\u8a71\u3092\u5e83\u3052\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2>C\u3067\u306e\u578b\u5ba3\u8a00<\/h2>\n<p>C\u8a00\u8a9e\u3067\u306e\u578b\u5ba3\u8a00\u306f\u3001\u5ba3\u8a00\u3059\u308b\u578b\u306e\u9818\u57df\u3092\u78ba\u4fdd\u3059\u308b\u3082\u306e\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include<\/span><span class=\"cpf\">&lt;stdio.h&gt;<\/span>\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">test<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/\u3053\u3053\u3067int\u578b\u3092\u6271\u3046\u305f\u3081\u306e4\u30d0\u30a4\u30c8\u306e\u9818\u57df\u306e\u53d6\u5f97<\/span>\r\n    <span class=\"n\">test<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%d<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">test<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"err\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"o\">:~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"n\">gcc<\/span> <span class=\"n\">test<\/span><span class=\"p\">.<\/span><span class=\"n\">c<\/span> <span class=\"o\">-<\/span><span class=\"n\">o<\/span> <span class=\"n\">test<\/span>\r\n<span class=\"n\">ussy<\/span><span class=\"err\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"o\">:~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"p\">.<\/span><span class=\"o\">\/<\/span><span class=\"n\">test<\/span> \r\n<span class=\"mi\">4<\/span>\r\n<\/code><\/pre>\n<p>\u307e\u305f\u3001Rust\u306e\u4f8b\u306f\u3053\u3061\u3089\u3067\u3059\u3002<\/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=\"k\">let<\/span> <span class=\"n\">n<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/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\">n<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"o\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"p\">:<\/span><span class=\"o\">~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"n\">rustc<\/span> <span class=\"n\">test<\/span><span class=\"py\">.rs<\/span> \r\n<span class=\"n\">ussy<\/span><span class=\"o\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"p\">:<\/span><span class=\"o\">~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"err\">.<\/span><span class=\"o\">\/<\/span><span class=\"n\">test<\/span> \r\n<span class=\"mi\">4<\/span>\r\n<\/code><\/pre>\n<p>\u540c\u3058\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u306d\u3002<br \/>\n\u78ba\u304b\u306b\u3001\u66f8\u304d\u65b9\u4e57\u308a\u9055\u3044\u306f\u3042\u308c\u3069\u3001\u4e21\u65b9\u3068\u3082\u578b\u3092\u5b9a\u7fa9\u3057\u3066\u3044\u308b\u3088\u3046\u306b\u898b\u3048\u307e\u3059\u3002<br \/>\n\u3068\u3053\u308d\u304c&#8230;<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include<\/span><span class=\"cpf\">&lt;stdio.h&gt;<\/span>\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">a<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">a<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'c'<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"[%c]<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">a<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"err\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"o\">:~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"n\">gcc<\/span> <span class=\"kt\">int<\/span><span class=\"p\">.<\/span><span class=\"n\">c<\/span> <span class=\"o\">-<\/span><span class=\"n\">o<\/span> <span class=\"kt\">int<\/span>\r\n<span class=\"n\">ussy<\/span><span class=\"err\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"o\">:~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"p\">.<\/span><span class=\"o\">\/<\/span><span class=\"kt\">int<\/span> \r\n<span class=\"p\">[<\/span><span class=\"n\">c<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<p>\u306a\u3093\u3067\u3084\u306d\u3093\u3063\u3066\u611f\u3058\u3067\u3059\u306d\u3002<br \/>\n\u79c1\u304cC\u3092\u89e6\u308a\u59cb\u3081\u305f\u6700\u521d\u306b\u7a81\u3063\u8fbc\u3093\u3060\u5834\u6240\u3067\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001C\u8a00\u8a9e\u3067\u306e\u578b\u5ba3\u8a00\u306f\u3001int\u306b\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u3082\u306e\u3067\u306f\u306a\u304f\u3001\u3042\u304f\u307e\u3067\u300cint\u578b\uff084byte\uff09\u5206\u306e\u9818\u57df\u3092\u53d6\u5f97\u3059\u308b\u3082\u306e\u300d\u3060\u304b\u3089\u3067\u3059\u3002char\u578b\u306f1byte\u306a\u306e\u3067\u3001ascii\u306a\u30894\u6587\u5b57\u5206\u5165\u308a\u307e\u3059\u3002<br \/>\n\u52ff\u8ad6\u3001Rust(\u3068\u3044\u3046\u304b\u4ed6\u306e\u8a00\u8a9e)\u3067\u306f\u6012\u3089\u308c\u307e\u3059\u3002<\/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=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">n<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'c'<\/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\">n<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"o\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"p\">:<\/span><span class=\"o\">~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"n\">rustc<\/span> <span class=\"n\">test<\/span><span class=\"py\">.rs<\/span> \r\n<span class=\"n\">error<\/span><span class=\"p\">[<\/span><span class=\"n\">E0308<\/span><span class=\"p\">]:<\/span> <span class=\"n\">mismatched<\/span> <span class=\"n\">types<\/span>\r\n <span class=\"o\">-<\/span><span class=\"k\">-&gt;<\/span> <span class=\"n\">test<\/span><span class=\"py\">.rs<\/span><span class=\"p\">:<\/span><span class=\"mi\">3<\/span><span class=\"p\">:<\/span><span class=\"mi\">9<\/span>\r\n  <span class=\"p\">|<\/span>\r\n<span class=\"mi\">2<\/span> <span class=\"p\">|<\/span>     <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">n<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">|<\/span>                <span class=\"o\">---<\/span> <span class=\"n\">expected<\/span> <span class=\"n\">due<\/span> <span class=\"n\">to<\/span> <span class=\"n\">this<\/span> <span class=\"k\">type<\/span>\r\n<span class=\"mi\">3<\/span> <span class=\"p\">|<\/span>     <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'c'<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">|<\/span>         <span class=\"o\">^^^<\/span> <span class=\"n\">expected<\/span> <span class=\"err\">`<\/span><span class=\"nb\">i32<\/span><span class=\"err\">`<\/span><span class=\"p\">,<\/span> <span class=\"n\">found<\/span> <span class=\"err\">`<\/span><span class=\"nb\">char<\/span><span class=\"err\">`<\/span>\r\n  <span class=\"p\">|<\/span>\r\n<span class=\"n\">help<\/span><span class=\"p\">:<\/span> <span class=\"n\">you<\/span> <span class=\"n\">can<\/span> <span class=\"n\">cast<\/span> <span class=\"n\">a<\/span> <span class=\"err\">`<\/span><span class=\"nb\">char<\/span><span class=\"err\">`<\/span> <span class=\"n\">to<\/span> <span class=\"n\">an<\/span> <span class=\"err\">`<\/span><span class=\"nb\">i32<\/span><span class=\"err\">`<\/span><span class=\"p\">,<\/span> <span class=\"n\">since<\/span> <span class=\"n\">a<\/span> <span class=\"err\">`<\/span><span class=\"nb\">char<\/span><span class=\"err\">`<\/span> <span class=\"n\">always<\/span> <span class=\"n\">occupies<\/span> <span class=\"mi\">4<\/span> <span class=\"n\">bytes<\/span>\r\n  <span class=\"p\">|<\/span>\r\n<span class=\"mi\">3<\/span> <span class=\"p\">|<\/span>     <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"sc\">'c'<\/span> <span class=\"k\">as<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">|<\/span>             <span class=\"o\">++++++<\/span>\r\n\r\n<span class=\"n\">error<\/span><span class=\"p\">:<\/span> <span class=\"n\">aborting<\/span> <span class=\"n\">due<\/span> <span class=\"n\">to<\/span> <span class=\"n\">previous<\/span> <span class=\"n\">error<\/span>\r\n\r\n<span class=\"n\">For<\/span> <span class=\"n\">more<\/span> <span class=\"n\">information<\/span> <span class=\"n\">about<\/span> <span class=\"n\">this<\/span> <span class=\"n\">error<\/span><span class=\"p\">,<\/span> <span class=\"k\">try<\/span> <span class=\"err\">`<\/span><span class=\"n\">rustc<\/span> <span class=\"o\">--<\/span><span class=\"n\">explain<\/span> <span class=\"n\">E0308<\/span><span class=\"err\">`.<\/span>\r\n<\/code><\/pre>\n<p>\u7d20\u6674\u3089\u3057\u3044\u3067\u3059\u306d\u3002<br \/>\n\u79c1\u304cC\u4ee5\u5916\u306e\u8a00\u8a9e\u3092\u89e6\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u611f\u52d5\u3057\u305f\u90e8\u5206\u3067\u3059\u3002<br \/>\n\u578b\u304c\u6307\u5b9a\u3055\u308c\u308b\u3053\u3068\u2252\u30e1\u30e2\u30ea\u3092\u78ba\u4fdd\u3059\u308b\u3053\u3068<br \/>\n\u3068\u3044\u3046\u3068\u3053\u308d\u304c\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<\/p>\n<hr \/>\n<h2>\u69cb\u9020\u4f53<\/h2>\n<p>\u7d9a\u3044\u3066C\u306e\u69cb\u9020\u4f53\u3067\u3059\u3002<br \/>\nC\u3067\u306f\u3001\u30c7\u30fc\u30bf\u3092\u69cb\u9020\u4f53\u3068\u3044\u3046\u5f62\u3067\u4fdd\u6301\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">strct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">in<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 4\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"n\">ch<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 1\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">str<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ ?\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u307e\u305f\u3001\u69cb\u9020\u4f53\u3092\u578b\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306f\u4ee5\u4e0b\u306e\u66f8\u304d\u65b9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">typedef<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">i<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ int\u578b\uff1a4\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"n\">ch<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ char\u578b\uff1a1\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">str<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ ?\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"n\">Strct<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>C\u3067\u69cb\u9020\u4f53\u3092\u8003\u3048\u308b\u3068\u304d\u306f\u3001\u4e0a\u8a18\u306e\u3088\u3046\u306b\u4f55\u30d0\u30a4\u30c8\u3042\u308b\u304b\u3092\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<br \/>\n\u56e0\u307f\u306bRust\u3067\u306f\u3053\u3093\u306a\u611f\u3058\u306e\u66f8\u304d\u65b9\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">struct<\/span> <span class=\"n\">Strct<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">i<\/span><span class=\"p\">:<\/span> <span class=\"nb\">i32<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">ch<\/span><span class=\"p\">:<\/span> <span class=\"nb\">char<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"n\">st<\/span><span class=\"p\">:<\/span> <span class=\"nb\">String<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u3055\u3066\u3001\u3053\u3053\u3067\u7591\u554f\u304c\u51fa\u3066\u304d\u307e\u3059\u306d\u3002\u6587\u5b57\u5217\u306f\u4f55\u30d0\u30a4\u30c8\u306b\u306a\u308b\u3067\u3057\u3087\u3046\uff1f<br \/>\n\u5165\u529b\u3059\u308b\u6587\u5b57\u306e\u6570\u306b\u3088\u3063\u3066\u30d0\u30a4\u30c8\u6570\u304c\u5909\u308f\u308b\u306e\u3067\u3057\u3087\u3046\u304b\uff1f<\/p>\n<p>\u5b9f\u306f\u3001C\u306b\u306f\u6587\u5b57\u5217\u578b\u306a\u3093\u3066\u4fbf\u5229\u306a\u3082\u306e\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6587\u5b57\u5217\u3068\u3044\u3046\u306e\u306f\u3001char\u578b\u306e\u96c6\u5408\u4f53\u3068\u8003\u3048\u307e\u3059\u3002<\/p>\n<p>\u3053\u3053\u3067\u3001char*\u3068\u547c\u3070\u308c\u308b\u3082\u306e\u304c\u51fa\u3066\u304d\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001C\u3067\u304a\u306a\u3058\u307f\u30dd\u30a4\u30f3\u30bf\u3068\u8a00\u308f\u308c\u308b\u3082\u306e\u3067\u3059\u3002<br \/>\n\u8aac\u660e\u3092\u59cb\u3081\u308b\u3068\u4f59\u767d\u304c\u8db3\u308a\u306a\u304f\u306a\u308b\u306e\u3067\u3001\u7c21\u5358\u306b\u304a\u4f1d\u3048\u3059\u308b\u3068\u3001\u3053\u308c\u306f\u30e1\u30e2\u30ea\u306e\u756a\u5730\u3092\u6307\u3059\u77e2\u5370\u3092\u8868\u3057\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3001\u6587\u5b57\u5217\u306e\u5ba3\u8a00\u306f\u3001\u300cchar\u578b\u306e\u96c6\u5408\u306e\u5148\u982d\u306e\u4f4f\u6240\u3092\u683c\u7d0d\u3059\u308b\u300d\u3068\u3044\u3046\u3082\u306e\u3067\u3059\u3002<br \/>\n\u30dd\u30a4\u30f3\u30bf\u578b\u306f32bit\u30674\u30d0\u30a4\u30c8\u300164bit\u30678\u30d0\u30a4\u30c8\u306e\u5927\u304d\u3055\u306a\u306e\u3067\u3001\u3053\u308c\u306f8\u30d0\u30a4\u30c8\u306e\u5927\u304d\u3055\u306b\u306a\u308b\u308f\u3051\u3067\u3059\u306d\uff01<br \/>\n\u3053\u308c\u306b\u3088\u308a\u3001\u6587\u5b57\u5217\u306f\u5225\u306e\u30e1\u30e2\u30ea\u306b\u683c\u7d0d\u3057\u3066\u3001\u305d\u306e\u5148\u982d\u30a2\u30c9\u30ec\u30b9\u3092\u5ba3\u8a00\u3059\u308b\u3053\u3068\u3067\u3001\u6587\u5b57\u5217\u30928\u30d0\u30a4\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3053\u308c\u3067\u3053\u306e\u69cb\u9020\u4f53\u304c\u4f7f\u7528\u3059\u308b\u30e1\u30e2\u30ea\u9818\u57df\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u69cb\u9020\u4f53\u304c\u4f7f\u7528\u3059\u308b\u30e1\u30e2\u30ea\u306e\u8a08\u7b97\u4f8b\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include<\/span><span class=\"cpf\">&lt;stdio.h&gt;<\/span>\r\n\r\n<span class=\"c1\">\/\/ 12+4\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"k\">typedef<\/span> <span class=\"k\">struct<\/span> <span class=\"n\">details<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">float<\/span> <span class=\"n\">tall<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 4\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">char<\/span><span class=\"o\">*<\/span> <span class=\"n\">from<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 8\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"n\">person_details<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"c1\">\/\/ 28+4\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"n\">person<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">name<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 8\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">age<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 4\u30d0\u30a4\u30c8<\/span>\r\n    <span class=\"n\">person_details<\/span> <span class=\"n\">details<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 16\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">person_details<\/span> <span class=\"n\">ussy_details<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"mi\">174<\/span><span class=\"p\">.<\/span><span class=\"mi\">8<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"s\">\"Saga\"<\/span>\r\n    <span class=\"p\">};<\/span>\r\n    <span class=\"k\">struct<\/span> <span class=\"n\">person<\/span> <span class=\"n\">ussy<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"s\">\"ushijima\"<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"mi\">28<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"n\">ussy_details<\/span>\r\n    <span class=\"p\">};<\/span>\r\n\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"name: %s, from: %s, age: %d, tall: %.1f<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ussy<\/span><span class=\"p\">.<\/span><span class=\"n\">name<\/span><span class=\"p\">,<\/span> <span class=\"n\">ussy<\/span><span class=\"p\">.<\/span><span class=\"n\">details<\/span><span class=\"p\">.<\/span><span class=\"n\">from<\/span><span class=\"p\">,<\/span> <span class=\"n\">ussy<\/span><span class=\"p\">.<\/span><span class=\"n\">age<\/span><span class=\"p\">,<\/span> <span class=\"n\">ussy<\/span><span class=\"p\">.<\/span><span class=\"n\">details<\/span><span class=\"p\">.<\/span><span class=\"n\">tall<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"size of pointer: %ld byte<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"size of person_details: %ld byte<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"n\">person_details<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"size of person: %ld byte<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"k\">struct<\/span> <span class=\"n\">person<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nl\">name:<\/span> <span class=\"n\">ushijima<\/span><span class=\"p\">,<\/span> <span class=\"n\">from<\/span><span class=\"o\">:<\/span> <span class=\"n\">Saga<\/span><span class=\"p\">,<\/span> <span class=\"n\">age<\/span><span class=\"o\">:<\/span> <span class=\"mi\">28<\/span><span class=\"p\">,<\/span> <span class=\"n\">tall<\/span><span class=\"o\">:<\/span> <span class=\"mi\">174<\/span><span class=\"p\">.<\/span><span class=\"mi\">8<\/span>\r\n<span class=\"n\">size<\/span> <span class=\"n\">of<\/span> <span class=\"n\">pointer<\/span><span class=\"o\">:<\/span> <span class=\"mi\">8<\/span> <span class=\"n\">byte<\/span>\r\n<span class=\"n\">size<\/span> <span class=\"n\">of<\/span> <span class=\"n\">person_details<\/span><span class=\"o\">:<\/span> <span class=\"mi\">16<\/span> <span class=\"n\">byte<\/span>\r\n<span class=\"n\">size<\/span> <span class=\"n\">of<\/span> <span class=\"n\">person<\/span><span class=\"o\">:<\/span> <span class=\"mi\">32<\/span> <span class=\"n\">byte<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3053\u3067\u4e8c\u500b\u76ee\u306e\u306a\u3093\u3067\u3084\u306d\u3093\u30dd\u30a4\u30f3\u30c8\u3067\u3059\u3002<br \/>\n\u69cb\u9020\u4f53\u306f\u3001\u4e2d\u306e\u8981\u7d20\u306e\u9818\u57df\u306e\u548c\u306b\u306a\u308b\u306f\u305a&#8230;\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001person_details\u578b\u306f16\u30d0\u30a4\u30c8\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u3053\u308c\u306f\u3001C\u8a00\u8a9e\u306estruct\u306e\u7279\u6027\u3067\u300164bit\u306e\u5834\u5408\u3001\u69cb\u9020\u4f53\u5168\u4f53\u306f8\u306e\u500d\u6570\u306b\u3059\u308b\u3088\u3046\u306b\u3001\u7a7a\u3044\u305f\u9699\u9593\u3092\u57cb\u3081\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\n\u305d\u3046\u3059\u308b\u3053\u3068\u3067\u3001\u30a2\u30af\u30bb\u30b9\u3059\u308b\u901f\u5ea6\u304c\u901f\u304f\u306a\u308a\u307e\u3059\u3002<br \/>\n\u5f93\u3063\u3066\u300116-12=4\u30d0\u30a4\u30c8\u306e\u30c7\u30fc\u30bf\u3092\u5165\u308c\u308b\u3053\u3068\u3067\u30018\u306e\u500d\u6570\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u524d\u3001\u79c1\u304c\u89e6\u3063\u3066\u3044\u305f\u3068\u304d\u306f\u3001\u69cb\u9020\u4f53\u306e\u521d\u671f\u5316\u306e\u969b\u306b\u30010\u30af\u30ea\u30a2\u3092\u5fb9\u5e95\u3059\u308b\u3088\u3046\u306b\u8a00\u308f\u308c\u307e\u3057\u305f\u3002<br \/>\n\u60f3\u5b9a\u3057\u306a\u3044\u4f55\u304b\u304c\u8d77\u304d\u305f\u6642\u3001\u3053\u306e\u9699\u9593\u306b\u5165\u308c\u305f\u30c7\u30fc\u30bf\u304c\u4e88\u671f\u305b\u306c\u6319\u52d5\u3092\u8d77\u3053\u3059\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u4eca\u306e\u8a00\u8a9e\u3067\u306f\u3001\u3042\u307e\u308a\u610f\u8b58\u3057\u306a\u304f\u3066\u3082\u66f8\u3051\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u30c7\u30fc\u30bf\u304c\u5b9f\u614b\u304b\u3069\u3046\u304b\u3092\u8003\u3048\u308b\u304d\u3063\u304b\u3051\u306b\u306f\u306a\u308b\u304b\u306a\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<hr \/>\n<h2>\u30a8\u30e9\u30fc\u51e6\u7406<\/h2>\n<p>\u6700\u5f8c\u306b\u30a8\u30e9\u30fc\u51e6\u7406\u306e\u8a71\u3092\u3057\u307e\u3059\u3002<br \/>\nC\u8a00\u8a9e\u3067\u79c1\u304c\u884c\u3063\u3066\u304d\u305f\u30a8\u30e9\u30fc\u51e6\u7406\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u3082\u306e\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">#include<\/span> <span class=\"cpf\">&lt;stdio.h&gt;<\/span><span class=\"cp\">\r\n#include<\/span> <span class=\"cpf\">&lt;stdlib.h&gt;<\/span><span class=\"cp\">\r\n#include<\/span> <span class=\"cpf\">&lt;string.h&gt;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u69cb\u9020\u4f53\u306e\u5ba3\u8a00(12byte + 4byte)<\/span>\r\n<span class=\"k\">typedef<\/span> <span class=\"k\">struct<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kt\">int<\/span> <span class=\"n\">num<\/span><span class=\"p\">;<\/span>    <span class=\"c1\">\/\/ 4 byte<\/span>\r\n\t<span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">str<\/span><span class=\"p\">;<\/span>  <span class=\"c1\">\/\/ 8 byte<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"n\">struct_tmp<\/span><span class=\"p\">;<\/span>\r\n\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"nf\">func1<\/span><span class=\"p\">(<\/span><span class=\"n\">struct_tmp<\/span> <span class=\"o\">*<\/span><span class=\"n\">tmp<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">char_num_limit<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">32<\/span><span class=\"p\">;<\/span>\r\n\r\n\t<span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"c1\">\/\/ 32byte\u306e\u9818\u57df\u306e\u78ba\u4fdd<\/span>\r\n\t<span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"kt\">char<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span><span class=\"n\">malloc<\/span><span class=\"p\">(<\/span><span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"kt\">char<\/span><span class=\"p\">)<\/span><span class=\"o\">*<\/span><span class=\"n\">char_num_limit<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">memset<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span><span class=\"p\">,<\/span> <span class=\"sc\">'\\0'<\/span><span class=\"p\">,<\/span> <span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"kt\">char<\/span><span class=\"p\">)<\/span><span class=\"o\">*<\/span><span class=\"n\">char_num_limit<\/span><span class=\"p\">);<\/span>\r\n    \r\n    <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">s1<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"aaaaaaaaaa\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 10byte<\/span>\r\n    <span class=\"c1\">\/\/char *s1 = \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\"; \/\/ 30byte<\/span>\r\n    <span class=\"kt\">char<\/span> <span class=\"o\">*<\/span><span class=\"n\">s2<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"aaaaaaaaaa\"<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ 10byte<\/span>\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">char_num<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"c1\">\/\/ \u6587\u5b57\u6570\u30ab\u30a6\u30f3\u30c8<\/span>\r\n    <span class=\"k\">for<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">s1<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span><span class=\"o\">!=<\/span><span class=\"sc\">'\\0'<\/span><span class=\"p\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"o\">++<\/span><span class=\"n\">char_num<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">for<\/span><span class=\"p\">(<\/span><span class=\"kt\">int<\/span> <span class=\"n\">i<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"n\">s2<\/span><span class=\"p\">[<\/span><span class=\"n\">i<\/span><span class=\"p\">]<\/span><span class=\"o\">!=<\/span><span class=\"sc\">'\\0'<\/span><span class=\"p\">;<\/span> <span class=\"o\">++<\/span><span class=\"n\">i<\/span><span class=\"p\">,<\/span> <span class=\"o\">++<\/span><span class=\"n\">char_num<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">num<\/span> <span class=\"o\">=<\/span> <span class=\"n\">char_num<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u6587\u5b57\u5217\u5927\u304d\u3059\u304e\u308c\u3070\u51e6\u7406\u3092\u7d42\u4e86<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"n\">char_num<\/span> <span class=\"o\">&gt;<\/span> <span class=\"n\">char_num_limit<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">goto<\/span> <span class=\"n\">fatal_err<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n\t<span class=\"n\">sprintf<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span><span class=\"p\">,<\/span> <span class=\"s\">\"str: %s%s\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">s1<\/span><span class=\"p\">,<\/span> <span class=\"n\">s2<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nl\">fatal_err:<\/span>\r\n    <span class=\"c1\">\/\/ \u30e1\u30e2\u30ea\u306e\u89e3\u653e<\/span>\r\n\t<span class=\"n\">free<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"n\">free<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"fatal error<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">return<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"kt\">int<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"c1\">\/\/ \u30dd\u30a4\u30f3\u30bf\u5909\u6570<\/span>\r\n    <span class=\"n\">struct_tmp<\/span> <span class=\"o\">*<\/span><span class=\"n\">tmp<\/span> <span class=\"o\">=<\/span> <span class=\"nb\">NULL<\/span><span class=\"p\">;<\/span>\r\n\r\n    <span class=\"c1\">\/\/ struct_tmp\u306e\u5927\u304d\u3055\u5206\u306e\u9818\u57df\u3092\u78ba\u4fdd\uff0816byte\uff09<\/span>\r\n    <span class=\"n\">tmp<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"n\">struct_tmp<\/span><span class=\"o\">*<\/span><span class=\"p\">)<\/span><span class=\"n\">malloc<\/span><span class=\"p\">(<\/span><span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"n\">struct_tmp<\/span><span class=\"p\">));<\/span>\r\n    <span class=\"n\">memset<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"p\">,<\/span> <span class=\"sc\">'\\0'<\/span><span class=\"p\">,<\/span> <span class=\"k\">sizeof<\/span><span class=\"p\">(<\/span><span class=\"n\">struct_tmp<\/span><span class=\"p\">));<\/span>\r\n\r\n    <span class=\"kt\">int<\/span> <span class=\"n\">ret<\/span> <span class=\"o\">=<\/span> <span class=\"n\">func1<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"return: %d<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">ret<\/span><span class=\"p\">);<\/span>\r\n\r\n    <span class=\"c1\">\/\/ \u6b63\u5e38\u5024\u304c\u8fd4\u3063\u3066\u304d\u305f\u5834\u5408<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"n\">ret<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c1\">\/\/ \u95a2\u6570\u3067\u51e6\u7406\u3057\u305f\u69cb\u9020\u4f53\u306e\u30c7\u30fc\u30bf\u3092\u51fa\u529b<\/span>\r\n        <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%d byte<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">num<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"n\">printf<\/span><span class=\"p\">(<\/span><span class=\"s\">\"%s<\/span><span class=\"se\">\\n<\/span><span class=\"s\">\"<\/span><span class=\"p\">,<\/span> <span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span><span class=\"p\">);<\/span>\r\n        \r\n        <span class=\"c1\">\/\/ \u30e1\u30e2\u30ea\u306e\u89e3\u653e<\/span>\r\n        <span class=\"n\">free<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"o\">-&gt;<\/span><span class=\"n\">str<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"n\">free<\/span><span class=\"p\">(<\/span><span class=\"n\">tmp<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n\r\n    <span class=\"k\">return<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"nl\">return:<\/span> <span class=\"mi\">0<\/span>\r\n<span class=\"mi\">20<\/span> <span class=\"n\">byte<\/span>\r\n<span class=\"n\">str<\/span><span class=\"o\">:<\/span> <span class=\"n\">aaaaaaaaaaaaaaaaaaaa<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">fatal<\/span> <span class=\"n\">error<\/span>\r\n<span class=\"k\">return<\/span><span class=\"o\">:<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span>\r\n<\/code><\/pre>\n<p>goto\u6587\u3068\u3044\u3046\u3082\u306e\u304c\u3042\u308a\u3001\u3053\u3053\u3067\u6307\u5b9a\u3057\u305f\u5834\u6240\u306e\u51e6\u7406\u306b\u30b8\u30e3\u30f3\u30d7\u3059\u308b\u3068\u3044\u3046\u30b3\u30fc\u30c9\u3067\u3059\u3002<br \/>\n\u60f3\u50cf\u306b\u96e3\u304f\u306a\u3044\u901a\u308a\u3001\u8af8\u60aa\u306e\u6839\u6e90\u3067\u3059\u3002<br \/>\n\u4eca\u56de\u306e\u30b3\u30fc\u30c9\u3067\u306f\u3001\u30a8\u30e9\u30fc\u304c\u8d77\u304d\u305f\u3089goto\u6587\u3092\u4f7f\u3063\u3066fatal_err\u307e\u3067\u98db\u3070\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u305d\u3053\u3067\u30e1\u30e2\u30ea\u3092\u958b\u653e\u3057\u3001print\u3092\u3057\u3066return\u3092\u8fd4\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\n\u305d\u3046\u3067\u3059\u3002C\u3067\u306f\u3001return\u5024\u3068\u3044\u3046\u306e\u306f\u305d\u306e\u51e6\u7406\u304c\u5931\u6557\u3057\u305f\u304b\u6210\u529f\u3057\u305f\u304b\u3092\u8fd4\u3059\u3082\u306e\u3067\u3057\u305f\u3002<br \/>\n\u30a8\u30e9\u30fc\u30b3\u30fc\u30c9\u3068\u3044\u3046\u3082\u306e\u3092\u7ba1\u7406\u3057\u3001\u51e6\u7406\u304c\u4f55\u304b\u7570\u5e38\u5024\u3092\u8fd4\u3059\u6642\u3001\u305d\u306e\u30b3\u30fc\u30c9\u3092return\u3057\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u4e2d\u3067\u51e6\u7406\u3057\u305f\u5185\u5bb9\u306f\u3069\u3046\u3084\u3063\u3066\u95a2\u6570\u306e\u5916\u306b\u6e21\u3059\u306e\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\n\u7b54\u3048\u306f\u3001\u5f15\u6570\u3067\u3059\u3002<br \/>\n\u51e6\u7406\u3057\u305f\u3044\u30c7\u30fc\u30bf\u306e\u5bb9\u91cf\u5206\u306e\u30e1\u30e2\u30ea\u3092\u5148\u306b\u78ba\u4fdd\u3057\u3001\u305d\u3053\u306b\u51e6\u7406\u3057\u305f\u30c7\u30fc\u30bf\u3092\u683c\u7d0d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u6700\u5f8c\u306b\u78ba\u4fdd\u3057\u305f\u30e1\u30e2\u30ea\u3092\u89e3\u653e\u3057\u3001\u4e00\u9023\u306e\u6d41\u308c\u3068\u306a\u308b\u308f\u3051\u3067\u3059\u3002<br \/>\n\u3053\u3093\u306a\u611f\u3058\u3067\u4f8b\u5916\u306e\u51e6\u7406\u3084\u30a8\u30e9\u30fc\u3092\u5224\u65ad\u3057\u3066\u3044\u307e\u3057\u305f\u3002\u5927\u5909\u3067\u3059\u306d&#8230;<\/p>\n<p>Rust\u3067\u306f\u3053\u3093\u306a\u3053\u3068\u3092\u3057\u306a\u304f\u3066\u3082\u3088\u3044\u3067\u3059\u3002<br \/>\n\u4fbf\u5229\u306a\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u306d\u3002\u305d\u3046\u3067\u3059\u3001Option\/Result\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">result_test<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">Result<\/span><span class=\"o\">&lt;<\/span><span class=\"nb\">String<\/span><span class=\"p\">,<\/span> <span class=\"p\">()<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">st<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">();<\/span>\r\n\r\n    <span class=\"n\">st<\/span> <span class=\"o\">=<\/span> <span class=\"s\">\"aaaaaaaaaaaaaaaaaaaa\"<\/span><span class=\"nf\">.to_string<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"c1\">\/\/st = \"aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\".to_string();<\/span>\r\n    <span class=\"n\">n<\/span> <span class=\"o\">=<\/span> <span class=\"n\">st<\/span><span class=\"nf\">.len<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">n<\/span> <span class=\"o\">&gt;<\/span> <span class=\"mi\">20<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">Err<\/span><span class=\"p\">(())<\/span>\r\n    <span class=\"p\">}<\/span> \r\n    <span class=\"nf\">Ok<\/span><span class=\"p\">(<\/span><span class=\"n\">st<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/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=\"nf\">result_test<\/span><span class=\"p\">()<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">());<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"o\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"p\">:<\/span><span class=\"o\">~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"err\">.<\/span><span class=\"o\">\/<\/span><span class=\"n\">result<\/span> \r\n<span class=\"n\">aaaaaaaaaaaaaaaaaaaa<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"n\">ussy<\/span><span class=\"o\">@<\/span><span class=\"n\">DESKTOP<\/span><span class=\"o\">-<\/span><span class=\"mi\">91<\/span><span class=\"n\">CH228<\/span><span class=\"p\">:<\/span><span class=\"o\">~\/<\/span><span class=\"n\">c<\/span><span class=\"err\">$<\/span> <span class=\"err\">.<\/span><span class=\"o\">\/<\/span><span class=\"n\">result<\/span> \r\n<span class=\"n\">thread<\/span> <span class=\"nv\">'main<\/span><span class=\"err\">'<\/span> <span class=\"n\">panicked<\/span> <span class=\"n\">at<\/span> <span class=\"nv\">'called<\/span> <span class=\"err\">`<\/span><span class=\"nn\">Result<\/span><span class=\"p\">::<\/span><span class=\"nf\">unwrap<\/span><span class=\"p\">()<\/span><span class=\"err\">`<\/span> <span class=\"n\">on<\/span> <span class=\"n\">an<\/span> <span class=\"err\">`<\/span><span class=\"nb\">Err<\/span><span class=\"err\">`<\/span> <span class=\"n\">value<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span><span class=\"err\">'<\/span><span class=\"p\">,<\/span> <span class=\"n\">result<\/span><span class=\"py\">.rs<\/span><span class=\"p\">:<\/span><span class=\"mi\">15<\/span><span class=\"p\">:<\/span><span class=\"mi\">34<\/span>\r\n<span class=\"n\">note<\/span><span class=\"p\">:<\/span> <span class=\"n\">run<\/span> <span class=\"n\">with<\/span> <span class=\"err\">`<\/span><span class=\"n\">RUST_BACKTRACE<\/span><span class=\"o\">=<\/span><span class=\"mi\">1<\/span><span class=\"err\">`<\/span> <span class=\"n\">environment<\/span> <span class=\"n\">variable<\/span> <span class=\"n\">to<\/span> <span class=\"n\">display<\/span> <span class=\"n\">a<\/span> <span class=\"n\">backtrace<\/span>\r\n<\/code><\/pre>\n<p>\u7c21\u5358\u306b\u30a8\u30e9\u30fc\u6642\u306e\u51e6\u7406\u3092\u5206\u3051\u3064\u3064\u51e6\u7406\u3057\u305f\u5024\u3092return\u3067\u53d7\u3051\u53d6\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u306a\u3093\u3066\u4fbf\u5229\u306a\u3093\u3067\u3057\u3087\u3046\uff01<br \/>\n\u3057\u304b\u3082\u5931\u6557\u3057\u305f\u3068\u304d\u306f\u78ba\u5b9a\u3067\u843d\u3061\u3066\u304f\u308c\u307e\u3059\u3002<br \/>\n\u3053\u308c\u304c\u5384\u4ecb\u306a\u3068\u3053\u308d\u3067\u3001\u30e1\u30e2\u30ea\u3092\u3044\u3058\u308a\u306a\u304c\u3089\u66f8\u3044\u3066\u3044\u308b\u3068\u3001\u5b9f\u306f\u843d\u3061\u305a\u306b\u51e6\u7406\u304c\u7d9a\u884c\u3055\u308c\u305f\u308a\u3057\u307e\u3059&#8230;<br \/>\n\u78ba\u5b9a\u3067\u30a8\u30e9\u30fc\u306b\u306a\u308b\u3053\u3068\u306f\u7d20\u6674\u3089\u3057\u3044\u3053\u3068\u3060\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>\u307e\u3068\u3081<\/h2>\n<p>\u3044\u304b\u304c\u3067\u3057\u305f\u3067\u3057\u3087\u3046\u304b\u3002<br \/>\n\u69d8\u3005\u306a\u8a00\u8a9e\u304b\u3089Rust\u306b\u6765\u305f\u6642\u306b\u7d20\u6674\u3089\u3057\u3044\u9762\u304c\u898b\u308c\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u4eca\u56de\u306fC\u304b\u3089\u305d\u308c\u4ee5\u5916\u306e\u8a00\u8a9e\u3092\u898b\u305f\u6642\u306b\u898b\u3048\u308b\u666f\u8272\u3092\u7d39\u4ecb\u3057\u307e\u3057\u305f\u3002<br \/>\n\u5b9f\u969b\u306b\u306f\u3001\u30e1\u30ea\u30c3\u30c8\u3082\u52ff\u8ad6\u3042\u308b\u306e\u3067\u3059\u304c\u3001\u4eca\u56de\u306f\u79c1\u304cRust\u3092\u89e6\u308a\u59cb\u3081\u305f\u6642\u306f\u3053\u3093\u306a\u98a8\u306b\u898b\u3048\u3066\u3044\u305f\u3053\u3068\u3092\u6848\u5185\u3057\u307e\u3057\u305f\u3002<br \/>\n\u7686\u3055\u3093\u306fRust\u304c\u3069\u3093\u306a\u98a8\u306b\u898b\u3048\u3066\u3044\u307e\u3059\u304b\uff1f\u307e\u305f\u3001\u6614\u306f\u3069\u3093\u306a\u98a8\u306b\u898b\u3048\u3066\u3044\u307e\u3057\u305f\u304b\uff1f<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u80cc\u666f Rust\u306f\u3057\u3070\u3057\u3070C\u3084C++\u8a00\u8a9e\u3068\u6bd4\u8f03\u3055\u308c\u308b\u8a18\u4e8b\u304c\u898b\u3089\u308c\u3001\u5b9f\u969b\u306b\u3001\u3088\u308a\u958b\u767a\u304c\u3057\u3084\u3059\u3044\u3088\u3046\u306a\u6a5f\u80fd\u304c\u591a\u3005\u5165\u3063 [&hellip;]<\/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-45752","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\/45752-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"\u80cc\u666f Rust\u306f\u3057\u3070\u3057\u3070C\u3084C++\u8a00\u8a9e\u3068\u6bd4\u8f03\u3055\u308c\u308b\u8a18\u4e8b\u304c\u898b\u3089\u308c\u3001\u5b9f\u969b\u306b\u3001\u3088\u308a\u958b\u767a\u304c\u3057\u3084\u3059\u3044\u3088\u3046\u306a\u6a5f\u80fd\u304c\u591a\u3005\u5165\u3063 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45752-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-03-01T21:46:42+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-28T23:07:33+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u5b87\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u5b87\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 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