The plan for the next three modules

The three characteristics of OOP fit closely together, but encapsulation is the most common in day-to-day programming and so is the focus of this unit and the next one. Inheritance and polymorphism both involve fussier, more detailed, syntax and are less commonly encountered, so I have delayed a thorough examination of them until Module 11. Each module is built around a main example:

• Module 9: Playing cards
• Module 10: Hunt the Wumpus
• Module 11: Rational Numbers (Fractions)