/**
 * A bank account has a balance that can be changed by deposits and withdrawals
 */
public class BankAccount2 implements Measurable
{ 
   private double balance ;
 
   /**
    * Creates a bank account with a given balance
    * @param initialBalance the initial balance
    */
   public BankAccount2(double initialBalance)
   {   
      balance = initialBalance;
   }

   /**
    * Deposits money into the bank account
    * @param amount the amount to deposit
    */
   public void deposit(double amount)
   {  
      double newBalance = balance + amount;
      balance = newBalance;
   }

   /**
    * Withdraws money from the bank account
    * @param amount the amount to withdraw
    */
   public void withdraw(double amount)
   {   
      double newBalance = balance - amount;
      balance = newBalance;
   }

   /**
    * Gets the current balance of the bank account.
    * @return the current balance
    */
   public double getBalance()
   {   
      return balance;
   }
   
    /*********************************************************************
    * Note to students: method getMeasure (below) implements the abstract*
    * getMeasure method of the Measurable interface, as required         *
    *********************************************************************/
   
   /**
    * Gets the measure of the bank account
    * @return the current balance
    */
   public double getMeasure()
   {
      return balance;
   }
}