srednia harmoniczna

#include <iostream>


double harmonicAverage(double, double);


int main()
{
    double First, Second;
    for(;;)
    {
        std::cout << "Podaj dwie liczby, 0 zeby skonczyc.\n";
        std::cin >> First >> Second;
        if(First == 0 || Second == 0)
            break;
        std::cout << "Srednia harmoniczna tych liczb to " << harmonicAverage(First, Second) << ". \n";
    }
    std::cout << "Wpisano 0 lub litere, koniec programu. ";
    return 0;
}

double harmonicAverage(double x, double y)
{
    double result = (2.0*x*y)/(x + y);
    return result;
}