Enhance the CashRegister class so that it keeps track of the total number of items in a sale. Count all recorded purchases and supply a method

int getItemCount()

that returns the number of items of the current purchase. Remember to reset the count at the end of the purchase.

Complete the following files:


/** A cash register totals up sales and computes change due. Also keeps track of the number of items in sale. */ public class CashRegister { public static final double QUARTER_VALUE = 0.25; public static final double DIME_VALUE = 0.1; public static final double NICKEL_VALUE = 0.05; public static final double PENNY_VALUE = 0.01; private double purchase; private double payment; /** Constructs a cash register with no money in it. */ public CashRegister() { purchase = 0; payment = 0; } /** Records the purchase price of an item. @param amount the price of the purchased item */ public void recordPurchase(double amount) { double newTotal = purchase + amount; purchase = newTotal; } /** Enters the payment received from the customer. @param dollars the number of dollars in the payment @param quarters the number of quarters in the payment @param dimes the number of dimes in the payment @param nickels the number of nickels in the payment @param pennies the number of pennies in the payment */ public void enterPayment(int dollars, int quarters, int dimes, int nickels, int pennies) { payment = dollars + quarters * QUARTER_VALUE + dimes * DIME_VALUE + nickels * NICKEL_VALUE + pennies * PENNY_VALUE; } /** Computes the change due and resets the machine for the next customer. @return the change due to the customer */ public double giveChange() { double change = payment - purchase; purchase = 0; payment = 0; return change; } public int getItemCount() { . . . } }