{"provider_url":"https://hatena.blog","width":"100%","provider_name":"Hatena Blog","author_name":"yupo5656","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyupo5656.hatenadiary.org%2Fentry%2F20071105%2Fp2\" title=\" \u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u9055\u3044\u3067\u60a9\u3093\u3060\u306e\u3067\u30ea\u30f3\u30af\u6642\u306b\u691c\u51fa - memologue\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","author_url":"https://blog.hatena.ne.jp/yupo5656/","categories":["binary","C++"],"height":"190","image_url":null,"blog_url":"https://yupo5656.hatenadiary.org/","description":"\u5148\u65e5\u3001\u6b21\u306e\u3088\u3046\u306aC++\u306e\u30af\u30e9\u30b9\u304c\u539f\u56e0\u3067\u5c11\u3005\u60a9\u307f\u307e\u3057\u305f\u3002 struct A { #ifdef V2 int bar_; /* \u30d0\u30fc\u30b8\u30e7\u30f32\u4ee5\u964d\u3067\u3057\u304b\u4f7f\u308f\u306a\u3044\u30e1\u30f3\u30d0\u5909\u6570(\u3089\u3057\u3044) */ #endif int foo_; /* \u4ee5\u4e0b\u7565 */ }; \u3053\u306eA\u3092\u4f7f\u3063\u3066\u3044\u308b.cpp\u306e\u4e00\u90e8\u306f\u3001g++ -DV2\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3066\u304a\u308a\u3001\u6b8b\u308a\u306f-DV2\u306a\u3057\u3067\u30b3\u30f3\u30d1\u30a4\u30eb\u3055\u308c\u3066\u3044\u305f\u306e\u3067\u3059\u3002sizeof(A)\u304c\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u540c\u58eb\u304c\u30ea\u30f3\u30af\u3055\u308c\u3066\u3057\u307e\u3044\u3001\u307e\u305a\u3044\u3053\u3068\u306b\u306a\u3063\u3066\u3044\u307e\u3057\u305f\u3002\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u3088\u3046\u306aa.h\u3068\u3001 // a.h struct A { #ifdef V2 int bar_; #endif int foo_; \u2026","version":"1.0","blog_title":"memologue","title":" \u69cb\u9020\u4f53\u306e\u30b5\u30a4\u30ba\u9055\u3044\u3067\u60a9\u3093\u3060\u306e\u3067\u30ea\u30f3\u30af\u6642\u306b\u691c\u51fa","url":"https://yupo5656.hatenadiary.org/entry/20071105/p2","published":"2007-11-05 00:00:01"}