An object as a member variable of another object

This is an example of one object (the shape class implements a rectangle) being a member variable of another object (a brick).

Header File: shape.h

#ifndef _SHAPE_H

#define _SHAPE_H



class FRectangle

{

public:

 FRectangle(double l = 0, double w = 0)

  : Length(l), Width(w) {}

 void setLength(double lgt);

 void setWidth(double wdt);

 double getLength() const;

 double getWidth() const;

 double Perimeter() const;

 double Area() const;

 void Properties();

private:

 double Length;

 double Width;

};



#endif // _SHAPE_H

Source File: shape.cpp

#include <iostream.h>

#include "shape.h"



void FRectangle::setLength(double lgt)

{

 Length = lgt;

}



void FRectangle::setWidth(double wdt)

{

 Width = wdt;

}



double FRectangle::getLength() const

{

 return Length;

}



double FRectangle::getWidth() const

{

 return Width;

}



double FRectangle::Perimeter() const

{

 return 2 * (Length + Width);

}



double FRectangle::Area() const

{

 return Length * Width;

}



void FRectangle::Properties()

{

 cout << "\nRectangle characteristics";

 cout << "\n\tLength    = " << Length;

 cout << "\n\tWidth     = " << Width;

 cout << "\n\tPerimeter = " << Perimeter();

 cout << "\n\tArea      = " << Area() << endl;

}

Header File: brick.h

#ifndef BRICK_H_

#define BRICK_H_



#include "shape.h"



class Brick

{

public:

 Brick() {}

 void setThickness(double Tck);

 void setDimensions(double l, double w, double t);

 void setColor(char* clr);

 void setTexture(char* txr);

 char* getColor() const;

 char* getTexture() const;

 double Volume() const;

 void Display();

private:

 FRectangle shape;

 char* Color;

 char* Texture;

 double Thickness;

};



#endif // BRICK_H_

Source File: brick.cpp

#include <iostream.h>

#include "brick.h"



void Brick::setThickness(double Tck)

{

 Thickness = Tck;

}



void Brick::setColor(char* clr)

{

 Color = clr;

}



void Brick::setTexture(char* txr)

{

 Texture = txr;

}



void Brick::setDimensions(double l, double w, double t)

{

 shape.setLength(l);

 shape.setWidth(w);

 setThickness(t);

}



char* Brick::getColor() const

{

 return Color;

}



char* Brick::getTexture() const

{

 return Texture;

}



double Brick::Volume() const

{

 return shape.getLength() * shape.getWidth() * Thickness;

}



void Brick::Display()

{

 cout << "\nBrick characteristics";

 cout << "\n\tLength   = " << shape.getLength();

 cout << "\n\tWidth    = " << shape.getWidth();

 cout << "\n\tArea     = " << shape.Area();

 cout << "\n\tVolume   = " << Volume();

 cout << "\n\tColor    = " << getColor();

 cout << "\n\tTextture = " << getTexture();

 cout << endl;

}

Main File: Exo.cpp

#include "shape.h"

#include "brick.h"



void main()

{

 Brick brick;



 brick.setDimensions(12.50, 8.75, 5.55);

 brick.setColor("Bone White");

 brick.setTexture("Early Breeze");



 brick.Display();

}

Here is an example of running the program:

Brick characteristics

        Length   = 12.5

        Width    = 8.75

        Area     = 109.375

        Volume   = 607.031

        Color    = Bone White

        Textture = Early Breeze