1 int a = 1, b; 2 g()3 g () { return 0; } h(x)4 h (x) {} 5 f()6 f () 7 { 8 if (g () == -1) 9 return 0; 10 a = g (); 11 if (b >= 1) 12 h (a); 13 return 0; 14 } 15 main()16 main () 17 { 18 f (); 19 if (a != 0) 20 abort (); 21 exit (0); 22 } 23