public class CheckingAccount extends BankAccount
{
	private int transactionCount;

	private static final int FREE_TRANSACTIONS = 3;
	private static final double TRANSACTION_FEE = 2.0;

	public CheckingAccount(int initialBalance)
	{
		super(initialBalance);
		transactionCount = 0;
	}
	public void deposit(double amount)
	{
		transactionCount++;
		super.deposit(amount);
	}
	public void withdraw(double amount)
	{
		transactionCount++;
		super.withdraw(amount);
	}
	public void deductFees()
	{
		if(transactionCount > FREE_TRANSACTIONS)
		{
			double fees = TRANSACTION_FEE * (transactionCount - FREE_TRANSACTIONS);
			super.withdraw(fees);
		}
		transactionCount = 0;
	}
}