Consider the following C program:

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);
}

What does the above program print?

Consider the following C program:

double foo(double); /* Line 1 */
int main () {
  double da, db;
  //input da
  db = foo(da);
}
double foo(double a){
  return a;
}

The above code compiled without any error or warning. If Line 1 is deleted, the above code will show:

Consider the following C function:

int f(int n)
{
static int i = 1;
if(n>=5) return n;
n = n+1;
i++;
return f(n);
}

The value returned by f(1) is

Consider the following C program

main ( )
{
  int x, y, m, n;
  scanf("%d %d", &x, &y);
  /* Assume x > 0 and y > 0 */
  m=x; n=y;
  while(m!=n)
  {
    if(m>n)
    m=m-n;
    else
    n=n-m;
  }
  printf("%d", n);
}

The program computes