How to add two positive integers in C and C++ without using any operator except comma

This program can be used to add two positive integers without using any operator.

<= How this code works, lets understand =>

- in this code we are passing %*c inside printf function
- star will be replaced by the value of variable a and variable b
 - c will print spaces- so printf will be evaluated like printf("%10c%20c",' ',' ');
- which means the printf will show 10 spaces then 30 spaces, so total 30 spaces will be printed
- then printf will return the no of characters those are printed, the returned value will be stored inside variable result

#include<stdio.h>

int main()
{
int a = 10;
int b = 20;
int result;

result = printf("%*c%*c",a,' ',b,' ');

printf("\raddition of %d and %d is %d",a,b,result);
}