{"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.systemjp.net%2Fentry%2F2023%2F12%2F01%2F134314\" title=\"\u30dd\u30a4\u30f3\u30bf\u3067\u6e21\u3055\u308c\u305f\u30af\u30e9\u30b9\u304c\u7d99\u627f\u3055\u308c\u305f\u5b50\u30af\u30e9\u30b9\u304b\u306e\u5224\u5b9a\u65b9\u6cd5 MFC - shikaku&#39;s blog\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"\u30dd\u30a4\u30f3\u30bf\u3067\u6e21\u3055\u308c\u305f\u30af\u30e9\u30b9\u304c\u7d99\u627f\u3055\u308c\u305f\u5b50\u30af\u30e9\u30b9\u304b\u306e\u5224\u5b9a\u65b9\u6cd5 MFC","author_name":"shikaku","blog_title":"shikaku's blog","width":"100%","description":"C++\u3067\u30dd\u30a4\u30f3\u30bf\u7d4c\u7531\u3067\u6e21\u3055\u308c\u305f\u30af\u30e9\u30b9\u304c\u7279\u5b9a\u306e\u5b50\u30af\u30e9\u30b9\u3067\u3042\u308b\u304b\u3092\u5224\u5b9a\u3059\u308b\u306b\u306f\u3001dynamic_cast\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002dynamic_cast\u306f\u5b9f\u884c\u6642\u306b\u578b\u306e\u5b89\u5168\u306a\u30ad\u30e3\u30b9\u30c8\u3092\u884c\u3044\u3001\u6307\u5b9a\u3057\u305f\u578b\u3078\u306e\u30ad\u30e3\u30b9\u30c8\u304c\u4e0d\u53ef\u80fd\u306a\u5834\u5408\u306fnullptr\u3092\u8fd4\u3057\u307e\u3059\u3002\u3053\u308c\u3092\u5229\u7528\u3057\u3066\u3001\u30dd\u30a4\u30f3\u30bf\u304c\u7279\u5b9a\u306e\u5b50\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6307\u3057\u3066\u3044\u308b\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001Base\u30af\u30e9\u30b9\u306e\u30dd\u30a4\u30f3\u30bfbasePtr\u304c\u3001Derived\u30af\u30e9\u30b9\u306e\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u3092\u6307\u3057\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u30c1\u30a7\u30c3\u30af\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u66f8\u304d\u307e\u3059\u3002 Base* basePtr; // \u4f55\u3089\u304b\u306e\u65b9\u6cd5\u3067\u521d\u671f\u5316\u3055\u308c\u3066\u3044\u308b Derived* derivedPtr = dynamic_\u2026","provider_url":"https://hatena.blog","url":"https://blog.systemjp.net/entry/2023/12/01/134314","type":"rich","categories":[],"height":"190","version":"1.0","published":"2023-12-01 13:43:14","author_url":"https://blog.hatena.ne.jp/shikaku/","image_url":null,"blog_url":"https://blog.systemjp.net/","provider_name":"Hatena Blog"}