求解下列程序的输出:
main()
{
union{
struct s{
unsigned S1:2;
unsigned S2:3;
unsigned S3:3;
}X;
unsigned char c;
}V;
V.c=100;
printf("%d\n",V.X.S3);
}

?
拿去运行一下不就出来了么?
结果不是3么?