1 unsigned long sub(int a)2 sub (int a) 3 { 4 return ((0 > a - 2) ? 0 : a - 2) * sizeof (long); 5 } 6 main()7 main () 8 { 9 if (sub (0) != 0) 10 abort (); 11 12 exit (0); 13 } 14