Program to Find Product of Two Numbers using Recursion in C++.

Solution

#include <iostream>

using namespace std;

int product(int a, int b)
{
    if (a < b)
        return product(b, a);
    else if (b != 0)
        return (a + product(a, b - 1));
    else
        return 0;
}
 
int main()
{
    int a,b,ans;
    cout<<"Enter two numbers ";
    cin>>a>>b;
    ans=product(a,b);
    cout<<"Answer is "<<ans;
    return 0;
}

Output :

Enter two numbers 5
7
Answer is 35