1static int 2test(int x) 3{ 4 union 5 { 6 int i; 7 double d; 8 } a; 9 a.d = 0; 10 a.i = 1; 11 return x >> a.i; 12} 13 14int main(void) 15{ 16 if (test (5) != 2) 17 abort (); 18 exit (0); 19} 20