Final answer:
Designing a vending machine simulation typically requires multiple classes to handle products, payment, and transactions efficiently. The main class can manage user interactions and machine operations, while additional classes like Product and Payment could be used for more detailed processes.
Step-by-step explanation:
Designing a vending machine simulation can indeed be accomplished with a class or multiple classes, depending on the level of complexity and functionalities desired. At its core, a vending machine involves interactions between a user, a product, and a transaction process. The vending machine class would manage these interactions by keeping track of available products, their prices, and handling the payment and change calculations. However, the design may also benefit from additional classes, such as a Product class to represent individual items with their specific attributes (such as price and quantity), and perhaps a Payment class to encapsulate the details of the payment process (including validation of sufficiency, coin and note recognition, etc.). The key operations would be the selection of a product, the insertion of payment, and dispensing the product and any change if necessary, or returning the payment if it is inadequate.