Question

Extend the example program creature.cpp by adding two other type of creatures (i.e., two new classes derived from Creature) with some example properties and methods (use your imagination for doing this). Use/implement at least one property and at least one method for each derived class. Each constructor, destructor and method should be implemented in such a way that each call is being documented via messages printed on the screen. Create one instance of Wizard, two instances of the two other classes, and call for each object methods of the particular instances (as in the original example).

#CODE FOR CREATURE PROGRAM

#include <iostream>

using namespace std;

class Creature {
   public:
       Creature();
       void run() const;

   protected:
       int distance;
};

Creature::Creature(): distance(10)
{}

void Creature::run() const
{
cout << "running " << distance << " meters!\n";
}

class Wizard : public Creature {
   public:
       Wizard();
       void hover() const;

   private:
       int distFactor;
};

Wizard::Wizard() : distFactor(3)
{}

void Wizard::hover() const
{
cout << "hovering " << (distFactor * distance) << " meters!\n";
}

int main()
{
cout << "Creating an Creature.\n";
Creature c;
c.run();

cout << "\nCreating a Wizard.\n";
Wizard w;
w.run();
w.hover();

return 0;
}

Answer 1

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Code:

#include <iostream>

using namespace std;

class Creature {

   public:

       Creature();

       void run() const;

   protected:

       int distance;

};

Creature::Creature(): distance(10)

{}

void Creature::run() const

{

cout << "running " << distance << " meters!\n";

}

class Wizard : public Creature {

   public:

       Wizard();

       void hover() const;

   private:

       int distFactor;

};

Wizard::Wizard() : distFactor(3)

{}

void Wizard::hover() const

{

cout << "hovering " << (distFactor * distance) << " meters!\n";

}

//Created new derived class from Creature

class Widget : public Creature{

    public:

        //constructor

        Widget();

        //new method added as click

        void click() const;

    private:

        //new data member

        int clickedDistance;

};

//constructor implementation

Widget::Widget() : clickedDistance(5)

{

    cout << "\nCreating a Widget.\n";   

}

//click method implementation

void Widget::click() const

{

    cout << "Clicked " << clickedDistance + distance << " meters\n";

}

//Created new derived class from Creature

class TextCreature : public Creature{

    public:

       //constructor

        TextCreature();

        //new method added as Moved

        void moved() const;

    private:

        //new data member

        int byDistance;

};

//implementation of TextCreature methods including constructor

TextCreature::TextCreature() : byDistance(3)

{

    cout <<"\nCreating a text Creature.\n";

}

void TextCreature::moved() const

{

    cout << "moved " << byDistance + distance << " meters\n";

}

int main()

{

cout << "\nCreating an Creature.\n";

Creature c;

c.run();

cout << "\nCreating a Wizard.\n";

Wizard w;

w.run();

w.hover();

//create an object of Widget class

Widget wdg;

//calling base class method

wdg.run();

//calling newly added method

wdg.click();

//create an object of TextCreature class

TextCreature txt;

//calling base class method

txt.run();

//calling newly added method

txt.moved();

return 0;

}

============screen shot of code==========

Output: