1 int test(arg)2 test (arg) 3 int arg; 4 { 5 if (arg > 0 || arg == 0) 6 return 0; 7 return -1; 8 } 9 main()10 main () 11 { 12 if (test (0) != 0) 13 abort (); 14 if (test (-1) != -1) 15 abort (); 16 exit (0); 17 } 18