源代码:00020 #ifndef _ANSI_H00021 #define _ANSI_H0002200023 #if __STDC__ == 100024 #define _ANSI 31459 /* compiler claims full ANSI conformance */00025 #endif0002600027 #ifdef __GNUC__00028 #define _ANSI 31459 /* gcc conforms enough even in non-ANSI mode */00029 #endif