#include <iostream>
using namespace std;

double total_check(double total);

int main()
{
    //variables
    int choice = 0;
    int dollars = 0;
    int quarters = 0;
    int dimes = 0;
    int nickels = 0;
    double const dollar = 1.00;
    double const quarter = 0.25;
    double const dime = 0.10;
    double const nickel = 0.05;
    double const twinkie = 3.50;
    double total = 0.00;
    double change = 0.00;

    cout.setf(ios::fixed);
    cout.setf(ios::showpoint);
    cout.precision(2);

    //Welcome message. Asks user for input. (dollars, quarters, dimes, nickels.)
    cout << "Hello, This is the Deep Fried Twinkie Machine. Deposit $3.50 for a Twinkie." << endl <<  "I accept dollars, quarters, qimesand nickels." << endl;


    do {
        // Menu
        cout << "1) Dollars " << endl;
        cout << "2) Quarters " << endl;
        cout << "3) Dimes " << endl;
        cout << "4) Nickels " << endl;
        cin >> choice;

        //Add and display coins and amount of money given by the user
        if (choice == 1) //Option for dollars
        {
            ++dollars;
            total = (total + dollar);
        }
        else if (choice == 2) //Option for Quarters
        {
            ++quarters;
            total = (total + quarter);
        }
        else if (choice == 3) //Option for Dimes
        {
            ++dimes;
            total = (total + dime);
        }
        else if (choice == 4) //Option for Nickels
        {
            ++nickels;
            total = (total + nickel);
        }
        else { //Displays error message for wrong input that isn't d/q/di/n
            cout << "Error" << endl;
        }

        //Display the change in coin amount and money
        cout << "You have entered the following coins: " << endl << "Dollars:      " << dollars << endl;
        cout << "Quarters:     " << quarters << endl << "Dimes:        " << dimes << endl << "Nickels:      " << nickels << endl;
        cout << "Total:       $" << total << endl << endl;

        //Check change
        change = total_check(total);

    } while (total <= twinkie); //Program terminates if option = 0

    return 0;
}

double total_check(double total)
{
    double change = 0.00;
    double const twinkie = 3.50;
    int choice;
    if (total >= twinkie) //Checks for input of $3.50
    {
        change = (total - twinkie);
        //Gives change if > 3.50
        cout << "\nYour change is: $" << change << endl << "Come back again soon!" << endl;
    }
    return(change);
}