Shopping cart exercise:

Step $1$:

Build the ItemToPurchase class with the following specifications:

Attributes

item$\_$name $($string$)$

item$\_$price $($float$)$

item$\_$quantity $($int$)$

Default constructor

Initializes item's name $=$ "none", item's price $=0,$ item's quantity $=0$

Method

print$\_$item$\_$cost$()$

Example of print$\_$item$\_$cost$()$ output:

Bottled Water $10$ @ $$1=$ $$10$

Step $2$:

In the main section of your code, prompt the user for two items and create two objects of the ItemToPurchase class.

Example:

Item $1$

Enter the item name:

Chocolate Chips

Enter the item price:

$3$

Enter the item quantity:

$1$

Item $2$

Enter the item name:

Bottled Water

Enter the item price:

$1$

Enter the item quantity:

$10$

Step $3$:

Add the costs of the two items together and output the total cost.

Example:

TOTAL COST

Chocolate Chips $1$ @ $$3=$ $$3$

Bottled Water $10$ @ $$1=$ $$10$

Total: $$13$

Step $4$:

Build the ShoppingCart class with the following data attributes and related methods. Note: Some can be method stubs $($empty methods$)$ initially, to be completed in later steps.

Parameterized constructor, which takes the customer name and date as parameters

Attributes

customer$\_$name $($string$)-$ Initialized in default constructor to "none"

current$\_$date $($string$)-$ Initialized in default constructor to "January $1,2020"$

cart$\_$items $($list$)$

Methods

add$\_$item$()$

Adds an item to cart$\_$items list. Has parameter ItemToPurchase. Does not return anything.

remove$\_$item$()$

Removes item from cart$\_$items list. 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.

modify$\_$item$()$

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.

get$\_$num$\_$items$\_$in$\_$cart$()$

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

get$\_$cost$\_$of$\_$cart$()$

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

print$\_$total$()$

Outputs total of objects in cart.

If cart is empty, output this message:

SHOPPING CART IS EMPTY

print$\_$descriptions$()$

Outputs each item's description.

Example of print$\_$total$()$ output:

John Doe's Shopping Cart $-$ February $1,2020$

Number of Items: $8$

Nike Romaleos $2$ @ $$189=$ $$378$

Chocolate Chips $5$ @ $$3=$ $$15$

Powerbeats $2$ Headphones $1$ @ $$128=$ $$128$

Total: $$521$

Example of print$\_$descriptions$()$ output:

John Doe's Shopping Cart $-$ February $1,2020$

Item Descriptions

Nike Romaleos: Volt color, Weightlifting shoes

Chocolate Chips: Semi$-$sweet

Powerbeats $2$ Headphones: Bluetooth headphones

Step $5$:

In the main section of your code, implement the print$\_$menu$()$ function. print$\_$menu$()$ 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 an invalid character is entered, continue to prompt for a valid choice. Hint: Implement Quit before implementing other options. Call print$\_$menu$()$ in the main$()$ function. Continue to execute the menu until the user enters q to Quit.

Example:

MENU

a $-$ Add item to cart

r $-$ Remove item from cart

c $-$ Change item quantity

i $-$ Output items' descriptions

o $-$ Output shopping cart

q $-$ Quit

Choose an option:

Step $6$:

Implement Output shopping cart menu option. Implement Output item's description menu option.

Example of shopping cart menu option:

OUTPUT SHOPPING CART

John Doe's Shopping Cart $-$ February $1,2020$

Number of Items: $8$

Nike Romaleos $2$ @ $$189=$ $$378$

Chocolate Chips $5$ @ $$3=$ $$15$

Powerbeats $2$ Headphones $1$ @ $$128=$ $$128$

Total: $$521$

Example of item description menu option.

OUTPUT ITEMS' DESCRIPTIONS

John Doe's Shopping Cart $-$ February $1,2020$

Item Descriptions

Nike Romaleos: Volt color, Weightlifting shoes

Chocolate Chips: Semi$-$sweet

Powerbeats $2$ Headphones: Bluetooth headphones

Step $7$:

In the main section of your code, prompt the user for a customer's name and today's date. Output the name and date. Create an object of type ShoppingCart.

Example:

Enter customer's name:

John Doe

Enter today's date:

February $1,2020$

Customer name: John Doe

Today's date: February $1,2020$

Step $8$:

Implement Add item to cart menu option.

Example:

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:

$2$

Step $9$:

Implement remove item menu option.

Example:

REMOVE ITEM