Chapter 10, Problem 8PE

Cash Register

This exercise assumes you have created the RetailItem class for Programming Exercise 5. Create a CashRegister class that can be used with the RetailItem class. The Cash Register class should be able to internally keep a list of RetailItem objects. The class should have the following methods:

■ A method named purchase_item that accepts a RetailItem object as an argument. Each time the purchase_item method is called, the RetailItem object that is passed as an argument should be added to the list.

■ A method named get_total: that returns the total price of all the RetailItem objects stored in the CashRegister object’s internal list.

■ A method named show_items that displays data about the RetailItem objects stored in the CashRegister object’s internal list.

■ A method named clear that should clear the CashRegister object’s internal list.

Demonstrate the CashRegister class in a program that allows the user to select several items for purchase. When the user is ready to check out, the program should display a list of all the items he or she has selected for purchase, as well as the total price.