Chapter 11. Object-Oriented Programming: Inheritance

1. Chapter 11.Object-Oriented Programming: Inheritance

2. 11.2 Base Classes and Derived Classes

3. “is a”

4. 11.3 protectedMembers

5. Overriding Methods

6. Overriding Methods Keep it change augmented

7. Overriding Methods • virtual– tells the compiler that this method CAN be overridden by derived classes • override – in the subclass, tells the compiler that this method is OVERRIDINGthe same method in the base class • base – in the subclass, calls the base class’s method

8. Abstract Classes cont abstract class

9. Abstract Classes cont

10. Sealed Classes and Methods

11. structs

12. struct ex.

13. interfaces

14. Interfaces Ex

15. 11.4.1 Creating and Using a CommissionEmployeeClass

26. 11.4.2 Creating a BasePlusCommissionEmployee Class without Using Inheritance

31. new

32. new

37. 11.4.3 Creating a CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy

41. 11.4.4 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using protected Instance Variables protected members public virtual decimal Earnings()

43. OK, because they are protected

48. 11.4.5 CommissionEmployee–BasePlusCommissionEmployee Inheritance Hierarchy Using private Instance Variables