using System;

public class Program

{

    public static void Main()

    {

        VendingMachine vm = new VendingMachine();

        vm.DepositCoin(25);

        vm.DepositCoin(10);

        vm.DepositCoin(25);

        vm.DepositCoin(25);

        vm.GetDrink();

        vm.GetRefund();

        vm.DepositCoin(15);

        vm.DepositCoin(50);

        vm.DepositCoin(1);

        vm.DepositCoin(20);

        vm.DepositCoin(5);

        vm.GetRefund();

        vm.GetDrink();

        vm.DepositCoin(25);

        vm.GetDrink();

        vm.DepositCoin(10);

        vm.GetDrink();

    }

}

​

public class VendingMachine

{

    public int depositedAmount {get; set;}

    //int coinAmount = 0;

    public VendingMachine()

    {

        depositedAmount = 0;

    }

    public void DepositCoin(int coinAmount)

    {

        if (coinAmount == 5 | coinAmount == 10 | coinAmount == 25)

        {

            depositedAmount = depositedAmount + coinAmount;

        }

        else

        {

            Console.WriteLine("Error: Unrecognized Coin!!");

        }

        Console.WriteLine("You have deposited {0} cents so far.",depositedAmount);

    }

    public void GetDrink()

    {

        if (depositedAmount >= 75)

        {

            int change = 0;

            if (depositedAmount > 75)

            {

                change = depositedAmount-75;

            }

            Console.WriteLine("Your change is {0}",change);

            Console.WriteLine("You received a drink!");

            depositedAmount = 0;

        }

        else

        {

            Console.WriteLine("Insert More Coins.");

        }

    }

    public void GetRefund()

    {

        Console.WriteLine("You were refunded {0} cents.",depositedAmount);

    }

}