/**
 * Class that extends BankAccount to model a savings account.
 *   @author Dave Reed
 *   @version 8/25/13
 */
public class SavingsAccount extends BankAccount {
  private double interestRate;
  
  public SavingsAccount(double rate) { 
    this.interestRate = rate;   
  } 
  
  public void addInterest() {  
    double interest = 
      this.getBalance()*this.interestRate/100;
    this.deposit(interest);
  } 
}