foo(a,b)1 foo (a, b) 2 { 3 return (a & (1 << b)) != 0; 4 } 5 bar(a,b)6 bar (a, b) 7 { 8 a ^= (1 << b); 9 return a != 0; 10 } 11 main()12 main () 13 { 14 int i; 15 for (i = 0; i < 32; i++) 16 printf ("%d ", foo (0x8000000f, i)); 17 puts (""); 18 } 19