public class AccountTest
{
    public static void main(String[] args)
    {

        SavingsAccount momsSavings
            = new SavingsAccount(50,0,0);

        TimeDepositAccount collegeFund
            = new TimeDepositAccount(10, 3);

        CheckingAccount harrysChecking
            = new CheckingAccount(0,0);

        momsSavings.deposit(10000);
        collegeFund.deposit(10000);

        momsSavings.transfer(harrysChecking, 2000);
        collegeFund.transfer(harrysChecking, 980);

        harrysChecking.withdraw(500);
        harrysChecking.withdraw(80);
        harrysChecking.withdraw(400);

        endOfMonth(momsSavings);
        endOfMonth(collegeFund);
        endOfMonth(harrysChecking);

        printBalance("mom's savings", momsSavings);
        // $10000 - $2000 + 0.5% interest = $8040
        printBalance("the college fund", collegeFund);
        // $10000 - $980 - $20 penalty + 1% interest
        // = $9090
        printBalance("Harry's checking", harrysChecking);
        // $2000 + $980 - $500 - $80 - $400 - $4 fees
        // = $1996

    }

    public static void endOfMonth(SavingsAccount savings)
    {  savings.addInterest();
    }

    public static void endOfMonth(CheckingAccount checking)
    {  checking.deductFees();
    }

    public static void printBalance(String name,
                                    DecimalAccount account)
    {  System.out.println("The balance of " + name
                          + " account is $" + account.getBalance());
    }
}