位字段

#include <stdio.h>struct { unsigned char is_keyword :1; unsigned char is_extern :1; unsigned char is_static :1; unsigned char is_a :1; unsigned char is_b :1; unsigned char is_c :1; unsigned char is_e :1; unsigned char is_f :1;} flags;int main(){ printf("%d/n",sizeof(flags)); flags.is_a = 1; flags.is_static = 1; printf("%X/n",flags.is_a); return 0;}