Unit Exercises

1. Based on Section 1.3: Objects and Their Interactions in Programming (Poo et al., 2008), consider the following scenario and outline the objects and their interactions in terms of messages and arguments: a customer buying a book from a bookstore.
2. Define a class structure for cars. A car generally has the ability to start, move forward, move backward, stop, and shut off. A car can also return to its relative location. The starting location is a value 0. You can use English as a pseudocode to describe the methods, similar to Poo et al. (2008). You don’t need to consider how to implement the methods in detail at this moment.