/*
Rodrigo Argumedo
Exception Handling: main.cpp
Created on April 23rd, 2017
*/

#include <iostream>
#include <string>
#include <iomanip>

const double conversion = 2.54;

const int inchesInFoot = 12;

double getLength();

int main() {
    double feet;
    double inches;
    double centimeters;

    std::cout << std::fixed << std::showpoint << std::setprecision(2);

    std::cout << "Feet: ";
    feet = getLength();
    std::cout << std::endl;

    std::cout << "Inches: ";
    inches = getLength();
    std::cout << std::endl;

    centimeters = (inchesInFoot * feet + inches) * conversion;

    std::cout << "Centimeter: " << centimeters << std::endl;

    return 0;
}

double getLength() {
    bool done = false;
    double number = 0;

    std::string str = "The input stream is in failed state.";

    do
    {
        try {
            std::cin >> number;

            if (number < 0) {
                throw std::exception("You entered a invalid number. ");
            }
        }
        catch (std::exception& e) {
            std::cerr << str << std::endl;
            std::cerr << e.what() << std::endl;
        }
    } while (!done);

    return number;
}