Recursive program in c to find the sum of digit

Write a recursive function in to Find the Sum of Digit

#include<stdio.h>
int sum_of_digit(int);
int main()
{
	int num,sod;
	printf("Enter any Number");
	scanf("%d",&num);
	sod=sum_of_digit(num);
	printf("Sum of Digit : %d",sod);
	return 0;
}
int sum_of_digit(int n)
{
	if(n==0)
	{
		return (0);
	}
	else
	{
		return (n%10+sum_of_digit(n/10));
	}
}

Enter any Number124

Sum of Digit : 7