Chapter 8, Problem 14RE

Explanation of Solution

Card for “CashRegister” class:

• An accessor method accesses an object without modifying it, and returns some information about that object.
  • In the class “CashRegister”, the method “giveChange()” act as an accessor method.
• Mutator method is a method that manipulates the internal data of an object.
  • In the class “CashRegister”, the method “recordPurchase()”, and “receivePayment()” act as mutator methods.
  • The value of “purchase”, and “payment” variables is changed whenever a call is made on the methods “recordPurchase()”, and “receivePayment()”.
• The sticky notes for “CashRegister” class is as follows:

• When an object is constructed using the constructor “CashRegister()”, the initial value “0” is assigned to the variables “purchase”, and “payment” as shown below:

• When the mutator method “recordPurchase()” is called with the value 29...