Get Programming with Scala

8 The vending machine

In this capstone, you will

• Implement functions and classes
• Code using variables and values
• Use if-else constructs

In this capstone, you’ll implement a class, load it into the REPL, and interact with it. In particular, you’ll represent a vending machine that sells two products: a white chocolate bar for $1.50 and a granola bar for $1.00. Let’s keep things simple and assume that your appliance doesn’t give any change back.

A customer can buy an item by selecting a specific product and inserting money into the vending machine. Once the vending machine receives the request, it should check that the product is available and the given money is enough; if all the checks are successful, it should collect the money and release ...