Extra Credit Assignment Objective:

Create a program that simulates the operation of a Vending Machine. Your program should

allow users to select one or more items and make purchases. Your program must assume that

the user can only insert quarters $)$ or dollars; therefore, your program should handle

accumulating the inserted amount until the purchase is made and provide the appropriate

amount of change $($based on the total amount purchased and the amount of money inserted$).$

Requirements:

Must use arrays to store the items available in the vending machine and their corresponding

prices. Must implement functions to handle item selection, display available items, calculate

total cost, and handle the purchase transaction.

Must use appropriate function prototypes and pass necessary arguments to functions.

Must use appropriate variable types according to the values it will hold

User interface: Must display appropriate messages on the screen to display the available items

and their prices, prompt the user with and obtain their input $($selection and inserted money$),$

must display messages to confirm selection, display current amount collected $($based on money

deposited$)$ and display if any change is being dispensed along with the product$($s$).$

Grading: Your program will be graded based on the following criteria:

Correctness of the program's logic in executing the objective outlined above

Program follows the required interface specification

Source code is well documented with programmer information

Uses functions to appropriately achieve the tasks including:

display the available items and their prices

allow users to select an item from the array

calculate the total cost of selected items

handle the purchase transaction, considering the user's input and available

balance

Continuously display the menu and prompt the user until they decide to exit or when the

balance is insufficient

Validate the user's input for item selection, quantity, and amount inserted

Implement error handling to manage scenarios where the user enters invalid input,

insufficient balance, or incorrect coin values.