This program extends the earlier "Online shopping cart" program. (Consider first saving your earlier program).

(1) Extend the ItemToPurchase class per the following specifications:

Parameterized constructor to assign item name, item description, item price, and item quantity (default values of 0). (1 pt)

Public member functions

SetDescription() mutator & GetDescription() accessor (2 pts)

PrintItemCost() - Outputs the item name followed by the quantity, price, and subtotal

PrintItemDescription() - Outputs the item name and description

Private data members

string itemDescription - Initialized in default constructor to "none"

Ex. of PrintItemCost() output:

Bottled Water 10 @ $1 = $10 

Ex. of PrintItemDescription() output:

Bottled Water: Deer Park, 12 oz. 

(2) Build three new files:

ShoppingCart.h - Class declaration

ShoppingCart.cpp - Class definition

main.cpp - main() function (Note: main()'s functionality differs from the previous program)

Build the ShoppingCart class with the following specifications. Note: Some can be function stubs (empty functions) initially, to be completed in later steps.

Default constructor

Parameterized constructor which takes the customer name and date as parameters (1 pt)

Private data members

string customerName - Initialized in default constructor to "none"

string currentDate - Initialized in default constructor to "January 1, 2016"

vector < ItemToPurchase > cartItems

Public member functions

GetCustomerName() accessor (1 pt)

GetDate() accessor (1 pt)

AddItem()

Adds an item to cartItems vector. Has parameter ItemToPurchase. Does not return anything.

RemoveItem()

Removes item from cartItems vector. Has a string (an item's name) parameter. Does not return anything.

If item name cannot be found, output this message: Item not found in cart. Nothing removed.

ModifyItem()

Modifies an item's description, price, and/or quantity. Has parameter ItemToPurchase. Does not return anything.

If item can be found (by name) in cart, check if parameter has default values for description, price, and quantity. If not, modify item in cart.

If item cannot be found (by name) in cart, output this message: Item not found in cart. Nothing modified.

GetNumItemsInCart() (2 pts)

Returns quantity of all items in cart. Has no parameters.

GetCostOfCart() (2 pts)

Determines and returns the total cost of items in cart. Has no parameters.

PrintTotal()

Outputs total of objects in cart.

If cart is empty, output this message: SHOPPING CART IS EMPTY

PrintDescriptions()

Outputs each item's description.

Ex. of PrintTotal() output:

John Doe's Shopping Cart - February 1, 2016 Number of Items: 8 Nike Romaleos 2 @ $189 = $378 Chocolate Chips 5 @ $3 = $15 Powerbeats 2 Headphones 1 @ $128 = $128 Total: $521 

Ex. of PrintDescriptions() output:

John Doe's Shopping Cart - February 1, 2016 Item Descriptions Nike Romaleos: Volt color, Weightlifting shoes Chocolate Chips: Semi-sweet Powerbeats 2 Headphones: Bluetooth headphones 

(3) In main(), prompt the user for a customer's name and today's date. Output the name and date. Create an object of type ShoppingCart. (1 pt) Ex.

Enter customer's name: John Doe Enter today's date: February 1, 2016 Customer name: John Doe Today's date: February 1, 2016 

(4) Implement the PrintMenu() function. PrintMenu() has a ShoppingCart parameter, and outputs a menu of options to manipulate the shopping cart. Each option is represented by a single character. Build and output the menu within the function.

If the an invalid character is entered, continue to prompt for a valid choice. Hint: Implement Quit before implementing other options. Call PrintMenu() in the main() function. Continue to execute the menu until the user enters q to Quit. (3 pts) Ex:

MENU a - Add item to cart d - Remove item from cart c - Change item quantity i - Output items' descriptions o - Output shopping cart q - Quit Choose an option: 

(5) Implement Output shopping cart menu option. (3 pts) Ex:

OUTPUT SHOPPING CART John Doe's Shopping Cart - February 1, 2016 Number of Items: 8 Nike Romaleos 2 @ $189 = $378 Chocolate Chips 5 @ $3 = $15 Powerbeats 2 Headphones 1 @ $128 = $128 Total: $521 

(6) Implement Output item's description menu option. (2 pts) Ex.

OUTPUT ITEMS' DESCRIPTIONS John Doe's Shopping Cart - February 1, 2016 Item Descriptions Nike Romaleos: Volt color, Weightlifting shoes Chocolate Chips: Semi-sweet Powerbeats 2 Headphones: Bluetooth headphones 

(7) Implement Add item to cart menu option. (3 pts) Ex:

ADD ITEM TO CART Enter the item name: Nike Romaleos Enter the item description: Volt color, Weightlifting shoes Enter the item price: 189 Enter the item quantity: 2 

(8) Implement remove item menu option. (4 pts) Ex:

REMOVE ITEM FROM CART Enter name of item to remove: Chocolate Chips 

(9) Implement Change item quantity menu option. Hint: Make new ItemToPurchase object and use ItemToPurchase modifiers before using ModifyItem() function. (5 pts) Ex:

CHANGE ITEM QUANTITY Enter the item name: Nike Romaleos Enter the new quantity: 3