Position Digits Sum

The program must accept two positive integers as the input and then print the sum of their unit digits, tenth digits and so on.

Input Format: The first line will contain A and B separated by a space.

Output Format: The first line will contain the sum of unit digits, tenth digits and so on with the values separated by a space.

Boundary Conditions: 1 <= A,B <= 9999999

Example Input/Output 1:
Input:
23 49

Output:
12 6

Example Input/Output 2:
Input:
12456 687

Output:
13 13 10 2 1

#include<stdio.h>
int main()
{
int a,b,r;
scanf("%d %d",&a,&b);
while(a!=0||b!=0)
{
    r=a%10+b%10;
    a/=10;
    b/=10;
    printf("%d ",r);
}
}