Monday, November 3, 2014

First of all we all should know what is sum of digits of a number?

Sum of digits of a number is defined as the sum of all the digits present in that number.
Example: 145, 1+4+5=10


PROGRAM

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#include<stdio.h>

int getSum(int);
int main(){
  int num,sum;
  printf("Enter a number: ");
  scanf("%d",&num);

  sum = getSum(num);

  printf("Sum of digits of number:  %d",sum);
  return 0;
}

int getSum(int num){

    static int sum =0,r;

    if(num!=0){
      r=num%10;
      sum=sum+r;
      getSum(num/10);
    }

    return sum;
}

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