Concept explainers
Cash Register
This exercise assumes you have created the RetailItem class for
■ 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.
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