This programming Project requires you to first complete Programming Project 6.7 from Chapter 6, which was an implementation of a
Pizza class. Add an Order class that contains a private vector of type Pizza. This class represents a customer's entire order,
where the order may consist of multiple pizzas. Include appropriate functions so that a user of the Order class can add
Pizzas to the order (type is deep dish, hand tossed, or pan; size is small, medium, or large; number of peperoni or cheese toppigs).
You can use constants to represent the tpe and size. Also write a function that outputs everything in the order along with the total price.
I've already written and done the project from chapter 6 :
I just need help implementing the vector into it.