Write a C$++$ program to manage a POS System. The main user is an employee

at a convenience store.

$1.$ The system should load a catalog of all products in the inventory, which include

products such as soda, chocolate, $...$ You can make the products into $2-3$ categories.

$2.$ A user can search the inventory: The user of the system can search the inventory by

using the category, exact product, or by price range.

$3.$ A user can sell products.

$4.$ Add new inventory.

$5.$ Remove inventory.

The program must have the following properties $(20$ points$)$:

$-$ You should do error handling and exception handling $($Ex: An employee cannot sell a

product that does not exist$)(5$ points$)$

$-$ You should use inheritance: Example: You can design a generic product class, then

design derived classes for different kinds of products. The product class may have the

following data members: ID $($string$),$ Category $($string$),$ Name $($string$),$ exp$-$date $($date$),$

and price $($floating number$).$ The product class will have a virtual function called

computePrice that will calculate the price of the product. $(5$ points$)$

$-$ You must use polymorphism.: Use functions overloading and overriding. $(5$ points$)$

$-$ You can add as many derived classes as you wish, but the following two classes are a

must: Tobacco, LotteryTickets. The Tobacco class must have a specialTax field, and the

LotteryTickets class has two tax fields, one for the city, and the other for the county. $(5$

points$)$

Also, design a menu $($should still appear until the exit option is chosen$)$ in the Main

program that has the following options implemented to test your classes$$ functionality

$(10$ points$)$:

$1.$ Search Inventory

$2.$ Sell products

$3.$ Add new inventory.

$4.$ Remove inventory.

$5.$ Exit

Extra Credit: $(10$ points$)$

$-$ Save and load data from and to a file or database.

$-$ Have the menu show in different colors than the

default.

there should be $2$ source files, $2$ header files and a main file to go with them