{"description":"gcc\u306e\u4e00\u98a8\u5909\u308f\u3063\u305f\u8b66\u544a\u30e1\u30c3\u30bb\u30fc\u30b8\u3002\u4e0b\u8a18\u30b3\u30fc\u30c9\u306ffalse(1)\u76f8\u5f53\u3092\u5b9f\u88c5\u3059\u308b\u3002 unsigned main = 3275800627u; // xor %eax, %eax ; 0x33 0xc0 // inc %eax ; 0x40 // ret ; 0xc3 // 0xc340c033 = 3275800627 gcc 4.6.3\uff20x86\u74b0\u5883\u306e\u5b9f\u884c\u7d50\u679c*1\uff1a $ gcc -Wall input.c input.c:1:10: warning: 'main' is usually a function [-Wmain] $ ./a.out; echo $? 1\u6ce8\u610f\uff1a\u305d\u3082\u305d\u3082C\u6a19\u6e96\u306b\u306f\u9055\u53cd\u3002\u2026","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohhoy.hatenadiary.jp%2Fentry%2F20121117%2Fp1\" title=\"&#39;main&#39; is usually a function - yohhoy\u306e\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","url":"https://yohhoy.hatenadiary.jp/entry/20121117/p1","height":"190","blog_url":"https://yohhoy.hatenadiary.jp/","categories":["gcc"],"blog_title":"yohhoy\u306e\u65e5\u8a18","author_name":"yohhoy","version":"1.0","published":"2012-11-17 00:00:00","author_url":"https://blog.hatena.ne.jp/yohhoy/","title":"'main' is usually a function","image_url":null,"width":"100%","provider_name":"Hatena Blog"}