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Initializing the Members of a Class Using a Constructor



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 box
Length = 8.65
Height = 4.25
Width  = 4.15
Area   = 162.12
Volume = 152.564