SPHERE.H

Furthermore, we can now separate the class declaration and definition of member functions into two files.
The sphere.h file holds the class declaration while sphere.cxx contains the member function definitions.

class sphere 
	{
	public:
	sphere(void);
	~sphere(void);
	void setRadius(float);
	float getRadius(void);
	protected:
	float xPosition;
	float yPosition;
	float zPosition;
	private:
	void resetPosition(void);
	float diameter;
	};

SPHERE.CXX

We include the sphere.h file here because member functions cannot be defined before a class is declared.

#include "sphere.h"

sphere::sphere(void)
	{
	resetPosition();
	diameter = 0.0;
	}	

sphere::~sphere(void)
	{
	}	

void sphere::setRadius(float value)
	{
	diameter = value*2.0;
	}

float sphere::getRadius(void)
	{
	return diameter/2.0;
	}

void sphere::resetPosition(void)
	{
	xPosition = 0.0;
	yPosition = 0.0;
	zPosition = 0.0;
	}