Sum digits of a number

1. Iterative:
The function has three lines instead of one line but it calculates sum in one line. It can be made one line function if we pass pointer to sum.

# include<stdio.h> int main() {   int n = 687;   printf(" %d ", getSum(n));     getchar();   return 0; }   /* Function to get sum of digits */ int getSum(int n) {     int sum;     /*Single line that calculates sum*/     for(sum=0; n > 0; sum+=n%10,n/=10);     return sum; }

2. Recursive
Thanks to ayesha for providing the below recursive solution.

int sumDigits(int no)

{

  return no == 0 ? 0 : no%10 + sumDigits(no/10) ;

}

 

int main(void)

{

  printf("%d", sumDigits(1352));

  getchar();

  return 0;

}