A Online Shopping System.

You need to create a program that simulates an online shopping system with the following classes:

• Product:

  • Create a class Product with attributes for productId (integer), productName (string), price (double), and quantityInStock (integer).
  • Include a constructor to initialize these attributes.

• Cart:

  • Create a class Cart to represent a shopping cart. Include a data structure (e.g., array or vector or list) to store Product objects.
  • Implement functions to add products to the cart, remove products from the cart, and calculate the total cost of the items in the cart.

• User:

  • Create a class User with attributes for userId (integer) and userName (string).
  • Include a constructor to initialize these attributes.

• Customer:

  • Create a derived class Customer that inherits from User.
  • Include an attribute for Cart to represent the customer's shopping cart.
  • Implement functions to add products to the cart and proceed with the checkout process.
  • Implement exception handling to check if a product is in stock before adding it to the cart and if the customer tries to purchase more items than available.

• Admin:

  • Create another derived class Admin that inherits from User.
  • Implement functions to add new products to the product catalog, update product details, and remove products from the catalog.

• Main program:

  • Create instances of Customer and Admin to simulate a user and an admin of the online store.
  • Allow the admin to manage the product catalog by adding, updating, or removing products.
  • Allow the customer to browse the catalog, add products to the cart, and proceed with the checkout, handling exceptions for out-of-stock items.
  • Provide clear and detailed comments in your code, and test various scenarios to ensure the exception handling, cart management, and user
    interactions work as expected.