I need help with this c$++$ program. please help thank you.

Store Invoice Application

Write a C$-+$ program containing a class Invoice and a driver program called InvoiceDriver.cpp$.$

The class Invoice is used in a hardware store to represent an invoice for an item sold at the store.

An invoice class should include the following:

A part number of type string

A part description of type string

A quantity of the item being purchased of type int

A price per item of type int

A class constructor that initializes the four data members

An accessor $($e$.$g$.,$ get member function$)$ for each of the data member

A mutator $($i$.$e$,$ a set member function$)$ for each of the data member

A member function named getinvoiceAmount that calculates the invoice amount $($i$.$e$.,$

multiplies the quantity' by the price per item, then it returns the amount as an int value

The constructor and the mutators functions should take into account the following

conditions: $$

i$.$ If the quantity is not positive, it should be set to $0$

ii$.$ If the price per item is not positive, it should be set to $0$

Separate the class definition $($Invoice cpp$)$ from the interface of the class $($Invoice$.$h$).$