{"id":2002,"date":"2011-02-07T22:53:58","date_gmt":"2011-02-07T04:53:58","guid":{"rendered":"http:\/\/www.moonmile.net\/blog\/archives\/2002"},"modified":"2011-02-07T22:54:51","modified_gmt":"2011-02-07T13:54:51","slug":"%e3%82%a2%e3%83%aa%e3%82%b9%e3%81%af%e3%83%97%e3%83%a9%e3%83%80%e3%81%8c%e3%81%8a%e5%a5%bd%e3%81%8d","status":"publish","type":"post","link":"http:\/\/www.moonmile.net\/blog\/archives\/2002","title":{"rendered":"\u30a2\u30ea\u30b9\u306f\u30d7\u30e9\u30c0\u304c\u304a\u597d\u304d"},"content":{"rendered":"<p>\n\u30d7\u30e9\u30c0\u306e\u9784\u3092\u76f4\u63a5\u3042\u3052\u308b\u306e\u304c\u5024\u6e21\u3057 | Moonmile Solutions Blog<br \/>\n<a href=\"http:\/\/www.moonmile.net\/blog\/archives\/1431\">http:\/\/www.moonmile.net\/blog\/archives\/1431<\/a><br \/>\n\u30d7\u30e9\u30c0\u306e\u9784\u3092\u304a\u306d\u3060\u308a\u3059\u308b\u306e\u304c\u53c2\u7167 | Moonmile Solutions Blog<br \/>\n<a href=\"http:\/\/www.moonmile.net\/blog\/archives\/1434\">http:\/\/www.moonmile.net\/blog\/archives\/1434<\/a><br \/>\n\u30a2\u30ea\u30b9\u306f\u30d7\u30e9\u30c0\u306e\u4e2d\u53e4\u304c\u304a\u5acc\u3044 | Moonmile Solutions Blog<br \/>\n<a href=\"http:\/\/www.moonmile.net\/blog\/archives\/1442\">http:\/\/www.moonmile.net\/blog\/archives\/1442<\/a>\n<\/p>\n<p>\n\u30d7\u30e9\u30c0\u306e\u9784\u30b7\u30ea\u30fc\u30ba\u3092\u518d\u958b\uff57\n<\/p>\n<p><a href='http:\/\/www.moonmile.net\/blog\/wp-content\/uploads\/2011\/02\/wpid-dworkblogimage20110207_01org.jpg'><img border='0' src='http:\/\/www.moonmile.net\/blog\/wp-content\/uploads\/2011\/02\/wpid-dworkblogimage20110207_01thum.jpg'\/><\/a><\/p>\n<p>\n\u3063\u3066\u306a\u8a33\u3067\u3001\u3061\u3087\u3063\u3068 C++ \u3067\u7d44\u3093\u3067\u307f\u307e\u3057\u305f\u3002<br \/>\nBag \u30af\u30e9\u30b9\u3092\u57fa\u5e95\u30af\u30e9\u30b9\u306b\u3057\u3066\u3001Prada \u3068 Tiffany \u30af\u30e9\u30b9\u3092\u4f5c\u308a\u307e\u3059\u3002\u305d\u3057\u3066\u3001\u30eb\u30a4\u30b9\u304c\u5c0b\u306d\u308b\u306e\u3067\u3059\u3002 Do you like this ?\n<\/p>\n<p>\n\u306a\u306e\u3067\u3001Alice \u30af\u30e9\u30b9\u306b DoYouLike \u30e1\u30bd\u30c3\u30c9\u3092\u8ffd\u52a0\u3057\u3066 Bag \u3092\u6e21\u3059\u3068\u3069\u3046\u306a\u308b\u3067\u3057\u3087\u3046\u304b\uff1f\n<\/p>\n<pre class=\"brush: cpp; title: ; notranslate\" title=\"\">\r\n#include &lt;iostream&gt;\r\n\r\nclass Bag {\r\nprotected:\r\n\tbool used ;\r\npublic:\r\n\tvirtual void setUsed() { used = true; }\r\n};\r\nclass Prada : public Bag {};\r\nclass Tiffany : public Bag {};\r\n\r\n#if 0\r\n\/\/ \u304a\u30d0\u30ab\u306a\u30a2\u30ea\u30b9\r\nclass Alice\r\n{\r\npublic:\r\n\tbool DoYouLike( void *bug ) \r\n\t{\r\n\t\treturn true;\r\n\t}\r\n};\r\n#else\r\n\/\/ \u8ce2\u3044\u30a2\u30ea\u30b9\r\nclass Alice\r\n{\r\npublic:\r\n\tbool DoYouLike( Bag *bag ) \r\n\t{\r\n\t\tPrada *prada = dynamic_cast&lt;Prada*&gt;(bag);\r\n\t\tif ( prada == NULL ) {\r\n\t\t\treturn false;\r\n\t\t} else {\r\n\t\t\treturn true;\r\n\t\t}\r\n\t}\r\n};\r\n#endif\r\n\r\nusing namespace std;\r\nint main(void)\r\n{\r\n\r\n\tAlice alice;\r\n\t{\r\n\t\tPrada bag;;\r\n\t\tif ( alice.DoYouLike( &amp;bag ) ) {\r\n\t\t\tcout &lt;&lt; &amp;quot;alice like Prada.&amp;quot; &lt;&lt; endl;\r\n\t\t} else {\r\n\t\t\tcout &lt;&lt; &amp;quot;alice don&#039;t like Prada.&amp;quot; &lt;&lt; endl;\r\n\t\t}\r\n\t}\r\n\t{\r\n\t\tTiffany bag;;\r\n\t\tif ( alice.DoYouLike( &amp;bag ) ) {\r\n\t\t\tcout &lt;&lt; &amp;quot;alice like Tiffany.&amp;quot; &lt;&lt; endl;\r\n\t\t} else {\r\n\t\t\tcout &lt;&lt; &amp;quot;alice don&#039;t like Tiffany.&amp;quot; &lt;&lt; endl;\r\n\t\t}\r\n\t}\r\n\treturn 0;\r\n}\r\n<\/pre>\n<p>\n\u304a\u30d0\u30ab\u306a\u30a2\u30ea\u30b9\u306e\u307b\u3046\u306f\u3001Bag \u304c\u8cb0\u3048\u305f\u3089\u305d\u308c\u3067\u5b09\u3057\u3044\u306e\u3067\u3001true \u3092\u8fd4\u3057\u307e\u3059\u3002\u30e1\u30bd\u30c3\u30c9\u3092\u898b\u308b\u3068\u5206\u304b\u308a\u307e\u3059\u304c\u3001\u4f55\u3082\u8003\u3048\u3066\u3044\u307e\u305b\u3093\u306d\u3002\n<\/p>\n<p>\n\u8ce2\u3044\u30a2\u30ea\u30b9\u306e\u307b\u3046\u306f\u3001dynmaic_cast \u3092\u4f7f\u3063\u3066\u30a2\u30c3\u30d7\u30ad\u30e3\u30b9\u30c8\u3092\u3057\u307e\u3059\u3002Prada \u3082 Tiffany \u3082 Bag \u30af\u30e9\u30b9\u3092\u7d99\u627f\u3057\u3066\u3044\u308b\u306e\u3067\u3001DoYouLike \u30e1\u30bd\u30c3\u30c9\u306b\u306f Bag* \u3067\u6e21\u3059\u306e\u3067\u3059\u304c\u3001\u3053\u308c\u304c Prada \u306a\u306e\u304b Tiffany \u306a\u306e\u304b\u3092 Alice \u81ea\u8eab\u304c\u5224\u65ad\u3057\u307e\u3059\u3002\n<\/p>\n<pre class=\"brush: php; title: ; notranslate\" title=\"\">\r\nD:\\work\\blog\\src\\alice&gt;a\r\nalice like Prada.\r\nalice don&#039;t like Tiffany.\r\n<\/pre>\n<p>\n\u305d\u3046\u3059\u308b\u3068\u3001\u3053\u3093\u306a\u98a8\u306b\u3001Prada \u306e\u9784\u3060\u3051\u3092\u597d\u307f\u307e\u3059\u3002<br \/>\n\u3053\u306e\u5224\u5225\u306e\u4ed5\u65b9\u3001\u3061\u3087\u3063\u3068\u306a\u3093\u3060\u304b\u306a\u3041\u3068\u601d\u3046\u306e\u306f\u3001\n<\/p>\n<ul>\n<li>\u57fa\u5e95\u30af\u30e9\u30b9\u306b virtual \u306a\u30e1\u30bd\u30c3\u30c9\u3092\u3072\u3068\u3064\u5fc5\u8981\u3068\u3059\u308b\u3002<\/li>\n<li>dynamic_cast \u3067\u30ad\u30e3\u30b9\u30c8\u3092\u5b9f\u884c\u3059\u308b\u306e\u3058\u3083\u306a\u304f\u3066\u3001\u5143\u306e\u578b\u3092\u5224\u5225\u3057\u305f\u3044\u306a\u3041\u3002<\/li>\n<\/ul>\n<p>\n\u3063\u3066\u3068\u3053\u308d\u3067\u3059\u306d\u3002virtual \u30e1\u30bd\u30c3\u30c9\u306f\u3001dynamic_cast \u306e\u5236\u9650\u306e\u3072\u3068\u3064\u3067(\u3067\u3044\u3044\u306e\u304b\u306a\uff1f)\u3001\u3072\u3068\u3064\u3060\u3051\u4eee\u60f3\u95a2\u6570\u304c\u306a\u3044\u3068\u99c4\u76ee\u306a\u3093\u3067\u3059\u3002<br \/>\n\u30ad\u30e3\u30b9\u30c8\u3092\u5b9f\u884c\u305b\u305a\u306b\u3001\u5143\u306e\u578b\u3092\u3068\u3044\u3046\u306e\u306f\u3001\u591a\u5206 Java \u3084 C# \u306e\u3088\u3046\u306a\u578b\u3092\u30e9\u30f3\u30bf\u30a4\u30e0\u3067\u6301\u3063\u3066\u3044\u308b\u8a00\u8a9e\u3058\u3083\u306a\u3044\u3068\u96e3\u3057\u3044\u3068\u601d\u3044\u307e\u3059\u3002\u305d\u3082\u305d\u3082 C++ \u306f\u578b\u81ea\u8eab\u306f\u30e1\u30e2\u30ea\u4e0a\u306b\u6301\u3063\u3066\u3044\u307e\u305b\u3093\u304b\u3089\u306d\u3002\u5358\u306a\u308b\u69cb\u9020\u4f53\u3068\u5909\u308f\u3089\u306a\u3044\u306e\u3067\u3059(v_tbl\u3068\u304b)\u3002\n<\/p>\n<p>\n\u3061\u306a\u307f\u306b C# \u3067\u66f8\u304f\u3068\u3053\u3093\u306a\u611f\u3058\u3002\n<\/p>\n<pre class=\"brush: csharp; title: ; notranslate\" title=\"\">\r\nusing System;\r\n\r\npublic class Bag {}\r\npublic class Prada : Bag {}\r\npublic class Tiffany : Bag {}\r\n\r\npublic class Alice {\r\n\tpublic bool DoYouLike( Bag bag ) {\r\n\t\tif ( bag as Prada != null ) {\r\n\t\t\treturn true;\r\n\t\t} else {\r\n\t\t\treturn false;\r\n\t\t}\r\n\t}\r\n}\r\n\r\npublic class Program {\r\n\tpublic static void Main(string &#x5B;]args ) {\r\n\t\tAlice alice = new Alice();\r\n\t\t\r\n\t\tPrada prada = new Prada();\r\n\t\tif ( alice.DoYouLike( prada ) ) {\r\n\t\t\tConsole.WriteLine(&quot;alice likes prada.&quot;);\r\n\t\t} else {\r\n\t\t\tConsole.WriteLine(&quot;alice don's likes prada.&quot;);\r\n\t\t}\r\n\r\n\t\tTiffany tiffaniy = new Tiffany();\r\n\t\tif ( alice.DoYouLike( tiffaniy ) ) {\r\n\t\t\tConsole.WriteLine(&quot;alice likes tiffaniy.&quot;);\r\n\t\t} else {\r\n\t\t\tConsole.WriteLine(&quot;alice don's likes tiffaniy.&quot;);\r\n\t\t}\r\n\t}\r\n}\r\n<\/pre>\n<p>\n\u3084\u3063\u3071\u308a as \u6f14\u7b97\u5b50\u3067\u30ad\u30e3\u30b9\u30c8\u3057\u3066\u8a66\u3057\u3066\u307f\u308b\u306e\u304c\u826f\u3055\u305d\u3046\u3067\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d7\u30e9\u30c0\u306e\u9784\u3092\u76f4\u63a5\u3042\u3052\u308b\u306e\u304c\u5024\u6e21\u3057 | Moonmile Solutions Blog http:\/\/www.moonmile.net\/blog\/archives\/1431 \u30d7\u30e9\u30c0\u306e\u9784\u3092\u304a\u306d\u3060\u308a\u3059\u308b\u306e\u304c\u53c2\u7167 | Moonm &hellip; <a href=\"http:\/\/www.moonmile.net\/blog\/archives\/2002\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[22],"tags":[],"class_list":["post-2002","post","type-post","status-publish","format-standard","hentry","category-c"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2002","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/comments?post=2002"}],"version-history":[{"count":1,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2002\/revisions"}],"predecessor-version":[{"id":2003,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/posts\/2002\/revisions\/2003"}],"wp:attachment":[{"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/media?parent=2002"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/categories?post=2002"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.moonmile.net\/blog\/wp-json\/wp\/v2\/tags?post=2002"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}