#include <iostream>
#include <stdlib.h>
#include <cstdlib>
#include <math.h>
#include <ctime>
using namespace std;
int main(void)
{
    string choice;
    string choice2;
    float temp = 0.0;
    float temp2 = -273.15;
    bool looping = true;
    while (looping == true)
    {
        cout << "Temperature Converter V1.1\n\n";
        cout << "1.) Farenheit to Celsius Converter\n";
        cout << "2.) Farenheit to Kelvin Converter\n";
        cout << "3.) Celsius to Farenheit Converter\n";
        cout << "4.) Celsius to Kelvin Converter\n";
        cout << "0.) Exit\n";
        cout << "> ";
        cin >> choice;
        system("clear");

        if (choice == "1") {
            cout << "Temperature Converter V1.1:\n";
            cout << "Farenheit to Celsius Converter\n\n";
            cout << "What is the temperature in Farenheit: ";
            cin >> temp;
            temp = (temp - 32) * 5/9;
            system("clear");
            cout << "Temperature Converter V1.1:\n";
            cout << "Farenheit to Celsius Converter\n\n";
            cout << "The temperature is " << temp << " degrees Celsius." << "\n\n";
            cout << "1.) Return to Main Menu\n";
            cout << "2.) Exit Program\n";
            cout << "> ";
            cin >> choice;
            while (looping == true)
            {
            if (choice == "1") // check that later
            {
                system("clear");
                break;
            }
            if (choice == "2")
            {
                cout << "\nExiting Program...";
                looping = false;
            }
            else
            {
                system("clear");
                cout << "Unknown option: (" << choice << ")\n"
                << "Available Options: 1 & 2\n\nReverted back to Main Menu.\n"
                << "Bug is still being worked out. Thank you for your patience.\n\n";
                break;
            }
        }
        }
        else if (choice == "2")
        {
            cout << "Temperature Converter V1.1:\n";
            cout << "Farenheit to Kelvin Converter\n\n";
            cout << "What is the temperature in Farenheit: ";
            cin >> temp;
            temp = (temp - 32) * 5/9;
            temp = temp + 273.15;
            system("clear");
            cout << "Temperature Converter V1.1:\n";
            cout << "Farenheit to Kelvin Converter\n\n";
            cout << "The temperature is " << temp << " degrees Kelvin." << "\n" << endl;
            cout << "1.) Return to Main Menu\n";
            cout << "2.) Exit Program\n";
            cout << "> ";
            cin >> choice;
            while (looping == true)
            {
            if (choice == "1") // check that later
            {
                system("clear");
                break;
            }
            if (choice == "2")
            {
                cout << "\nExiting Program...";
                looping = false;
            }
            else
            {
                system("clear");
                cout << "Unknown option: (" << choice << ")\n"
                << "Available Options: 1 & 2\n\nReverted back to Main Menu.\n"
                << "Bug is still being worked out. Thank you for your patience.\n\n";
                break;
            }
        }
        }
        else if (choice == "3")
        {
            cout << "Temperature Converter V1.1:\n";
            cout << "Celsius to Farenheit Converter\n\n";
            cout << "What is the temperature in Celsius: ";
            cin >> temp;
            temp = temp * 9/5 + 32;
            system ("clear");
            cout << "Temperature Converter V1.1:\n";
            cout << "Celsius to Farenheit Converter\n\n";
            cout << "The temperature is " << temp << " degrees Farenheit." << "\n" << endl;
            cout << "1.) Return to Main Menu\n";
            cout << "2.) Exit Program\n";
            cout << "> ";
            cin >> choice;
            while (looping == true)
            {
            if (choice == "1") // check that later
            {
                system("clear");
                break;
            }
            if (choice == "2")
            {
                cout << "\nExiting Program...";
                looping = false;
            }
            else
            {
                system("clear");
                cout << "Unknown option: (" << choice << ")\n"
                << "Available Options: 1 & 2\n\nReverted back to Main Menu.\n"
                << "Bug is still being worked out. Thank you for your patience.\n\n";
                break;
            }
        }
        }
        else if (choice == "4")
        {
            cout << "Temperature Converter V1.1:\n";
            cout << "Celsius to Kelvin Converter\n\n";
            cout << "What is the temperature in Celsius: ";
            cin >> temp;
            temp = temp + 273.15;
            temp = round(temp);
            system ("clear");
            if (temp == temp2 )
            {
                cout << "The temperature is 0 degrees Kelvin." << "\n" << endl;
            }
            else
            {
            cout << "Temperature Converter V1.1:\n";
            cout << "Celsius to Kelvin Converter\n\n";
            cout << "The temperature is " << temp << " degrees Kelvin." << "\n" << endl;
            cout << "1.) Return to Main Menu\n";
            cout << "2.) Exit Program\n";
            cout << "> ";
            cin >> choice;
            while (looping == true)
            {
            if (choice == "1") // check that later
            {
                system("clear");
                break;
            }
            if (choice == "2")
            {
                cout << "\nExiting Program...";
                looping = false;
            }
            else
            {
                system("clear");
                cout << "Unknown option: (" << choice << ")\n"
                << "Available Options: 1 & 2\n\nReverted back to Main Menu.\n"
                << "Bug is still being worked out. Thank you for your patience.\n\n";
                break;
            }
        }
        }
        }
        else if (choice == "0")
        {
            cout << "Exiting Program...\n";
            looping = false;
        }
        else
        {
            cout << "Unknown option: (" << choice << ")\n"
            << "Available Options: 1, 2, 3, 4, 0.\n\n";
        }
    }
    return 0;
}