In C programming.........Write a function which returns product of even digits of a number.

If I input 246 the output should be 48.

If I input 135 the output should be 0.

Function prototype :

int product_even_digits(int n);

Main method

int main()

{

int n; scanf("%d", &n); printf("Product even digits from %d is %d", n, product_even_digits(n) );

}