#include
struct bit
{
char i1:1;
char i2:1;
char i3:1;
char i4:1;
char i5:1;
char i6:1;
char i7:1;
char i8:1;
};
int main()
char x=1;
struct bit *pb=(struct bit*)&x;
pb->i5=1;
printf("%d\n",x);
system("pause");
return 0;
}
摘自：宋金时的blog