C++ Examples - A Simple Class

	A Simple Class

Exercise

Write a simple class called Cube. The object should calculate the total area and the volume based on the side measurement. If the program supplies a side equal or lower than 0, reset the side to 1. Create an empty constructor and an empty destructor.

Implement the object in different files.

Header File: cube.h

#ifndef CUBE_H
#define CUBE_H

class Cube
{
public:
	Cube();
	~Cube();
	void setSide(double s);
	double getSide();
	double Area();
	double Volume();
	void Properties();
private:
	double Side;
};

#endif

Source File cube.cpp

#include <iostream.h>
#include "cube.h"

Cube::Cube()
{
}

Cube::~Cube()
{
}

void Cube::setSide(double s)
{
	Side = s <= 0 ? 1 : s;
}

double Cube::getSide()
{
	return Side;
}

double Cube::Area()
{
	return 6 * Side * Side;
}

double Cube::Volume()
{
	return Side * Side * Side;
}

void Cube::Properties()
{
	cout << "Characteristics of this cube";
	cout << "\nSide   = " << getSide();
	cout << "\nArea   = " << Area();
	cout << "\nVolume = " << Volume() << "\n\n";
}

Main File: Exo.cpp

#include "cube.h"

void main()
{
	Cube cube;
	cube.setSide(-12.55);
	cube.Properties();

	Cube de;
	de.setSide(28.15);
	de.Properties();
}

Here is an example of the result:

Characteristics of this cube
Side   = 1
Area   = 6
Volume = 1

Characteristics of this cube
Side   = 28.15
Area   = 4754.53
Volume = 22306.7


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