Sum of Two numbers using recursion function in C

  How to add two number using recursion function in C?

Solution:

 

 

 

 

#include <stdio.h>

int main(int argc, char *argv[]){

    int a,b;

    scanf("%d%d",&a,&b);

    printf("%d",sum(a,b));

    return 0;

}

int sum(int a,int b){

    static int s=0;

    if(b > 0){

         s++;

         sum(a,b-1);

    }

    else if(a>0){

         s++;

         sum(a-1,b);

    }

    return s;

}