SPHERE.H

But, unlike a struct, a class can have member functions associated directly with it.
Member functions are accessed in a manner similiar to a struct member by using a dot.
Member functions cannot be accessed by others unless they are declared as public.

class sphere 
	{
	public:
	void setRadius(float value) { diameter = value*2.0; }
	float getRadius(void) { return diameter/2.0; }
	float xPosition;
	float yPosition;
	float zPosition;
	float diameter;
	};