有说明语句：
int a, b;
如果输入111222333，使得a的值为111，b的值为333，则以下正确的语句是( )
scanf("%3d%*3c%3d", &a, &b);
scanf("%*3d%3c%3d", &a, &b);
scanf("%3d%3d%*3d", &a, &b);
scanf("%3d%*2d%3d", &a, &b);
