Sum of Digits of 5 digit numbers

#include <stdio.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>

int main()
{
	
    int n;
    scanf("%d", &n);
     int sum=0;
     while(n>0)
     {
         int a=n%10;
         sum=sum+a;
         n=n/10;
     }
       printf("%d",sum);
    return 0;
}