extern int printf (); enum S { x1=0, x2=1 }; int main () { struct S { int abdd; }; struct S j; int i=x1; switch (i) { case 1: case 2: printf ("%d\n",45); default: printf ("%d\n",45); ; ; } if (i) { printf ("%d\n",i); } while (i--) { 2; } for (i; i; i++) ; do { 3; } while (i); }