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Posted: December 7th, 2022

Section 17.4 – OMIS 449: Business Application Development

Section 17.4 – OMIS 449: Business Application Development
Students:
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17.4 LAB-04
^^^_ This lab will be available until December 4th, 11:59 PM CST
This program extends the earlier -Online shopping cart- program. (Consider first saving your earlier program).
(1) Extend the ItemToPurchase class to contain a new attribute. (2 pts)
• item_description (string) – Set to -none- in default constructor
Implement the following method for the ItemToPurchase class.
• print_item_description() – Prints item_description attribute for an ItemToPurchase object. Has an ItemToPurchase parameter.
Ex. of print_item_description() output:
Bottled Water: Deer Park, 12 oz.
(2) 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 (2 pts)
• Attributes
o customer_name (string) – Initialized in default constructor to -none-
c current_date (string) – Initialized in default constructor to -January 1, 2016-
o cart_items (list)
• Methods
o add_item()
¦ Adds an item to cart_items list. Has parameter ItemToPurchase. Does not return anything.
o remove_item()
¦ Removes item from cart_items list. Has a string (an items name) parameter. Does not return anything.
¦ If item name cannot be found, output this message: Item not found in cart. Nothing removed.
o modify_item()
¦ Modifies an items quantity. Has parameter ItemToPurchase. Does not return anything.
¦ If item can be found (by name) in cart, modify item in cart.
¦ If item cannot be found (by name) in cart, output this message: Item not found in cart. Nothing modified.
g get_num_items_in_cart() (2 pts)
¦ Returns quantity of all items in cart. Has no parameters.
o get_cost_of_cart() (2 pts)
¦ Determines and returns the total cost of items in cart. Has no parameters.
o print_total()
¦ Outputs total of objects in cart.
¦ If cart is empty, output this message: SHOPPING CART IS EMPTY
p print_descriptions()
¦ Outputs each items description.
Ex. of print_total() output:
John Does Shopping Cart – February 1, 2016 Number of Items: 8
Nike Romaleos 2 @ $189 = $378
Chocolate Chips 5 @ $3 = $15
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12/3/22, 2:18 AM
Section 17.4 – OMIS 449: Business Application Development
Powerbeats 2 Headphones 1 @ $128 = $128
Total: $521
Ex. of print_descriptions() output:
John Does 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 section of your code, prompt the user for a customers name and todays date. Output the name and date. Create an object of type ShoppingCart. (1 pt)
Ex.
Enter customers name:
John Doe
Enter todays date:
February 1, 2016
Customer name: John Doe
Todays date: February 1, 2016
(4) 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 the 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. (3 pts)
Ex:
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:
(5) Implement Output shopping cart menu option. (3 pts)
Ex:
OUTPUT SHOPPING CART
John Does 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 items description menu option. (2 pts)
https://webcourses.niu.edu/ultra/courses/_331828_1/cl/outline
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12/3/22, 2:18 AM Section 17.4 – OMIS 449: Business Application Development
Ex.
OUTPUT ITEMS DESCRIPTIONS
John Does 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

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