#include<stdio.h>
void main()
{
    int a,sum,r;
    sum=0;
    printf("Enter the five digit number :");
    if(scanf("%d",&a)==1)
    {
        for(;a>0;)
        {
            r=a%10;
            sum=sum+r;
            a=a/10;

        }
            printf("answer=%d",sum);
    }
    else
    {
        printf("Enter correct number");
    }
}


=====================OUTPUT=====================
Enter the five digit number :12345
answer=15