// program to calculate the harmonic mean of values input
#include <iostream>

int main()
{
try{
    int countno(0);
    double total(0.0);
    double h(0.0);
    double result(0.0);

    while(true)
    {
        double value(0);
        std::cout << "Next value please:(1000 to end input) ";

        std::cin >> value;
        if(not std::cin) throw std::exception();
        if(value > 999) break;

        result = (1/value); // the reciprocal of this number is
        total += result; // add this to total reciprocals
        std::cout << "the reciprocal of 1/" << value << " is " <<  result << '\n';
        std::cout << "total is " << total << '\n';
        ++countno;

    }


    h = countno/total; //harmonic mean

    std::cout << "\nYou input " << countno << " values" << '\n';
    std::cout << "The total reciprocals is " << total << '\n';
    std::cout << "The Harmonic Mean of these values is " << h;
}
 catch(...)
 {
     std::cerr << "***An exception was thrown.***\n";
 }
}