Sams Teach Yourself C++ in 21 Days

Polymorphism 489

14

Exercises ........................................................................................................

1. Show the declaration for a class JetPlane, which inherits from Rocketand
   Airplane.


2. Show the declaration for Seven47, which inherits from the JetPlaneclass
   described in Exercise 1.


3. Write the code that derives Carand Busfrom the class Vehicle. Make Vehiclebe
   an abstract class with two pure virtual functions. Make Carand Busnot be abstract
   classes.


4. Modify the code in Exercise 3 so that Caris an abstract class, and derive
   SportsCarand Coupefrom Car. In the Carclass, provide an implementation for
   one of the pure virtual functions in Vehicleand make it nonpure.