Initializing the Members of a Class Using a Constructor

This example uses a class that contains a constructor used to initialize the object. The class is called ShoeBox. When supplied with a length, a height, and a width, the object should calculate and display the total area of all sides and the volume.

Header File: shoebox.h

#ifndef SHOEBOX_H

#define SHOEBOX_H

class ShoeBox{

public: 

ShoeBox(double l, double h, double w);

 double getLength() const; 

double getHeight() const; 

double getWidth() const; 

void Properties(); 

double Area() const; 

double Volume() const;

private: 

double Length; 

double Height; 

double Width;

};

#endif

Source File: shoebox.h

#include <iostream.h>

#include "box.h"

ShoeBox::ShoeBox(double l, double h, double w)

{ Length = l;

 Height = h; 

Width  = w;

}

double ShoeBox::getLength() const

{ return Length;

}

double ShoeBox::getHeight() const

{ return Height;

}double ShoeBox::getWidth() const{

 return Width;}

double ShoeBox::Area() const

{ 

return 2 * ((Length * Height) + (Height + Width) + (Length * Width));

}double ShoeBox::Volume() const

{ return Length * Height * Width;

}void ShoeBox::Properties(){

 cout << "Properties of the shoe box";

 cout << "\nLength = " << getLength(); 

cout << "\nHeight = " << getHeight(); 

cout << "\nWidth  = " << getWidth(); 

cout << "\nArea   = " << Area(); 

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

}

Header File: cube.h

#include "box.h"

void main()

{ ShoeBox Size6(8.65, 4.25, 4.15);

 Size6.Properties();

}

Here is a result of running the program

Properties of the shoe boxLength = 8.65

Height = 4.25

Width  = 4.15

Area   = 162.12

Volume = 152.564