// **************************************************************
// Implementation file sphereClass.cpp for the class sphereClass.
// **************************************************************

#include <iostream>
#include "sphereClass.h"   // header file

using namespace std;


sphereClass::sphereClass()
{
	theRadius = 1.0;
} // end default constructor

sphereClass::sphereClass(double initialRadius)
{
	theRadius = (initialRadius>0) ? initialRadius : 1.0;
} // end constructor

void sphereClass::SetRadius(double newRadius)
{
	theRadius = (newRadius>0) ? newRadius : theRadius;
} 

double sphereClass::Radius() const
{
	return theRadius;
}

double sphereClass::Diameter() const
{
	return 2.0 * theRadius;
}

double sphereClass::Circumference() const
{
	return PI * Diameter();
}

double sphereClass::Area() const
{
	return 4.0 * PI * (theRadius * theRadius);
}

double sphereClass::Volume() const
{
	double radiusCubed = theRadius * theRadius * theRadius;
	return (4.0 * PI * radiusCubed)/3.0;
}

void sphereClass::DisplayStatistics() const
{
	cout << "\nRadius = " << Radius()
	  << "\nDiameter = " << Diameter()
	  << "\nCircumference = " << Circumference()
	  << "\nArea = " << Area()
	  << "\nVolume = " << Volume() << endl;
}
// End of implementation file.