code-alchemist-arch / beverage-vending-simulator

A Beverage vending machine simulator program, implemented to showcase the State Design Pattern in action.

Coffee Vending Machine

A coffee vending machine simulator program, implemented to showcase the State Design Pattern in action.

This is a weekly lab assignment belonging to CSE-3216 (Software Design Patterns Lab).

Problem

You have to implement a coffee vending machine. Coffee machine works as follows:

• Machine accepts only coins of 10, 20 and 50 cents worth.
• Machine can prepare two types of drinks: Coffee and Cappuccino.
• Coffee is 1.20 and Cappuccino is 1.50.
• You can insert money and eject inserted money.
• When you select a beverage by pressing corresponding button, if there is not enough money, it gets ejected automatically.
• In case if there was enough money, the change should be returned and beverage should be prepared.
• When beverage is ready machine waits for the cup to be taken and only then you can make next order.

Your task is to implement coffee vending machine simulator program. You may assume that there are at most 5 cups of each beverage and after it runs out, you won’t be able to buy it anymore. The remaining money after buying a drink should be returned in coins of 10, 20 and 50 cents worth.

Design

Possible states of the coffee vending machine are visualized below:

More detailed documentation will be added later. Moreover, I hope to make further changes to this repository in future.