1#include <stdio.h> 2 3int counter; 4extern void foo (void); 5extern void xxx (void); 6 7void 8bar (void) 9{ 10} 11 12int 13main(void) 14{ 15 bar (); 16 foo (); 17 xxx (); 18 if (counter == 1) 19 printf ("PASS\n"); 20 return 0; 21} 22