Creating an Object

Now if you wanted to create an object from the derived class, you could use the following code:

#include <iostream.h> #include "tq.h" int main() { cout <<"Here is an example of inheritance...." << endl; cout<<"Using Base class, Creating a Reptile...." << endl; Reptile Dinosaur; cout<<"Lets See how much the first Dinosaur Weighed and the Size..nn"; cout <<"Name: Dinosaurn"; cout <<"Size: " << Dinosaur.getHeight() << endl; cout <<"Weight: " << Dinosaur.getWeight() << endl; cout <<"nn"; cout <<"Using Derived class, Creating a Lizard...." << endl; Lizard KamotoDragon; cout <<"Lets find out the size, weight, and age of this lizard...nn"; cout <<"Name: Kamoto Dragonn"; cout <<"Size: " << KamotoDragon.getHeight() << endl; cout <<"Weight: " << KamotoDragon.getWeight() << endl; cout <<"Age: " << KamotoDragon.getAge() << endl; return 0; }

As can be seen, I create an object the same way as you would with any other class. Notice I did not set its Height or Weight, nor did I need to because the base class (Reptile) had a constructor that set the Height and Weight when the object was created. When you create a derived class, the base class constructor is called first followed by the derived class constructor. The derived class has all the member functions and data that the base class had. You can add more to the base class by making a derived class. In this example I added a new member variable, itsAge, and I added two new functions, Regenerate and Run from Predator. If you want to access the new functions I added just type the following:

Lizard KamotoDragon; KamotoDragon. KamotoDragon.RegenerateTale(); KamotoDragon.RunFromPredator();

And you would get the console output:

Regenerating… Running….

The base class does not get the new functions you added to the derived class. If you written

Reptile Dinosaur; Dinosaur.RegenerateTale(); //you would get an error.

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