Rekurzija suma

#include <stdio.h>
int suma (int n)
    {
        int res;
        if(n==1)
        {
            return 1;
        }
        else
        {
            res=n+(suma(n-1));
        }
        return (res);
    }
int main()
    {
        int n;
        scanf("%d",&n);
        printf("%d\n",suma(n));
    return 0;
    }