#include <iostream>
#include <iomanip>
using namespace std;




void Menu(){ // <- The menu is (mostly) static, no need for it to be in main
    cout << "Simple temperature converter \n";
    cout << "Conversion options \n [1]C to F \n [2]F to C \n [3]F to K \n [4]C to K \n [5]Quit" << endl;
    cout << "Select option [1-5]: ";
}

double C, F, K;

double convertC2K(double C, double K) {
    K = (C + 273.15);
    return(K);
}

double convertC(double C, double F) { // <- converts to Celsius
    C = (F - 32) / 1.8;
    return(C);
}

double convertF(double C, double F) { // <- converts to fahrenheit
    F = (C * 1.8) + 32;
    return(F);
}

int main() {
    int input;
    Menu();
    cin >> input;
    do {
        if (input == 1) {
            cout << "Enter temperature in Celsius: ";
            cin >> input;
            C = input;
            cout << setprecision(2) << convertF(C, F) << endl;
            break;
        } 
        else if (input == 2) {
            cout << "Enter temperature in Fahrenheit: ";
            cin >> input;
            F = input;
            cout << setprecision(2) << convertC(C, F) << endl;
            break;
        }
        else if (input == 4) {
            cout << "Enter temperature in Celsius: ";
            cin >> input;
            C = input;
            cout << setprecision(2) << convertC2K << endl;
        }
        while (input != 4)
    }
    cout << "\nExiting...";
    return(0);
}





//
// Created by fuze on 8/13/22.
//