Sum of digit

Write a recursive function to print sum of digits of an entered number.

#include<stdio.h>
int Sum_of_digits_Rec(int);
int main()
{
	int num,sum;
	printf("Enter Number = ");
	scanf("%d",&num);
	sum = Sum_of_digits_Rec(num);
	printf("Sum of digits of number %d is %d\n",num,sum);
	return 0;
}
int Sum_of_digits_Rec(int n)
{
	static int sum = 0;
	if(n)
	{
		sum = sum + n % 10;
		n = n /10;
		Sum_of_digits_Rec(n);
	}
	return sum;
}

Output

Enter Number = 92837456
Sum of digits of number 92837456 is 44