public class SavingsAccount extends BankAccount
{
	public void addInterest()
	{	deposit(getBalance()*rate/100); }

	public SavingsAccount()
	{ 	this(0); }
	public SavingsAccount(double r)
	{ 	rate = r; 	}
	public SavingsAccount(double b, double r)
	{ 	super(b); rate = r; 	}

	// toString method
	public String toString()
	{	return "SavingsAccount["+super.toString()+" rate="+ rate+ "]"; }

	private double rate;	// Interest rate paid
}