What can be better than a cup of coffee during a break? A coffee that you don’t have to make yourself. It’s enough to press a couple of buttons on the machine and you get a cup of energy; but first, we should teach the machine how to do it. In this project, you will work on programming a coffee machine simulator. The machine works with typical products: coffee, milk, sugar, and plastic cups; if it runs out of something, it shows a notification. You can get three types of coffee: espresso, cappuccino, and latte. Since nothing’s for free, it also collects the money.

Let's simulate an actual coffee machine! What do we need for that? This coffee machine will have a limited supply of water, milk, coffee beans, and disposable cups. Also, it will calculate how much money it gets for selling coffee.

There are several options for the coffee machine we want you to implement: first, it should sell coffee. It can make different types of coffee: espresso, latte, and cappuccino. Of course, each variety requires a different amount of supplies, however, in any case, you will need only one disposable cup for a drink. Second, the coffee machine must get replenished by a special worker. Third, another special worker should be able to take out money from the coffee machine.