#include <stdio.h>

int getSum(int n)
{
   int sum = 0;
   while (n != 0)
   {
       sum = sum + n % 10;
       n = n/10;
   }
   return sum;
}

int main()
{
  int n;
  printf("Please choose a number: ");
  scanf("%d",&n);
  printf("The sum of digits is: %d", getSum(n));
  return 0;
}