Chapter 4, Problem 12PP

This programming project extends Programming Project 4.11. Create a PizzaOrder class that allows up to three pizzas to be saved in an order. Each pizza saved should be a Pizza object as described in Programming Project 4.11. In addition to appropriate instance variables and constructors, add the following methods:

$\text{public void setNumPizzas }\left(\text{int numPizzas}\right)$ —sets the number of pizzas in the order. $\text{numPizzas}$ must be between 1 and 3.

$\text{public void setPizza1 (Pizza pizza1)}$ —sets the number of pizzas in the order.

$\text{public void setPizza2 (Pizza pizza2)}$ —sets the second pizza in the order.

$\text{public void setPizza3 (Pizza pizza3)}$ —sets the third pizza in the order.

$\text{public double calcTotal()}$ —returns the total cost of the order.

Write a main method to test the class. The setPizza2 and setPizza3 methods will be used only if there are two or three pizzas in the order, respectively. Sample code illustrating the methods is shown below. Note that first three lines are incomplete. You must complete them as part of the Programming Project.

$\begin{array}{l}\text{Pizza pizza1}=//\text{ Code to create a large pizza, 1 cheese, 1 ham}\\ \text{Pizza pizza2}=//\text{ Code to create a medium pizza, 2 cheese, 2 pepperoni}\\ \text{PizzaOrder order}=//\text{ Code to create an order}\\ \text{order}\text{.setNumPizzas(2); }//2\text{ pizzas in the order}\\ \text{order}\text{.setPizzal(pizza1); }//\text{ Set first pizza}\\ \text{order}\text{.setPizza2(pizza2); }//\text{ Set second pizza}\\ \text{double total = order}\text{.calcTotal(); // Should be }18+20=38\end{array}$