A Class as a Member Variable of Another Class
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A Class as a Member Variable of Another Class |
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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();
}
Brick characteristics
Length = 12.5
Width = 8.75
Area = 109.375
Volume = 607.031
Color = Bone White
Textture = Early Breeze
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