Consider the following C-program:(GATE CS 2005)

void foo(int n, int sum) {   int k = 0, j = 0;   if (n == 0) return;     k = n % 10;   j = n / 10;   sum = sum + k;   foo (j, sum);   printf ("%d,", k); }   int main () {   int a = 2048, sum = 0;   foo (a, sum);   printf ("%d\n", sum);       getchar(); }

What does the above program print? 
(a) 8, 4, 0, 2, 14
(b) 8, 4, 0, 2, 0
(C) 2, 0, 4, 8, 14
(d) 2, 0, 4, 8, 0

Answer (d)
sum has no use in foo(), it is there just to confuse. Function foo() just prints all digits of a number. In main, there is one more printf statement after foo(), so one more 0 is printed after all digits of n.