// file: cylinder.cpp
// Cylinder class inherits from class Circle.
#include <iostream>  

using std::cout;

#include "cylinder.h"   // Cylinder class definition

// default constructor
Cylinder::Cylinder( double xValue, double yValue, double radiusValue, 
  double heightValue ) 
  : Circle( xValue, yValue, radiusValue )
{
   setHeight( heightValue );

} // end Cylinder constructor

// set Cylinder's height
void Cylinder::setHeight( double heightValue )
{
   height = ( heightValue < 0.0 ? 0.0 : heightValue );

} // end function setHeight

// get Cylinder's height
double Cylinder::getHeight() const
{
   return height;

} // end function getHeight

// redefine Circle function getArea to calculate Cylinder area
double Cylinder::getArea() const
{
   return 2 * Circle::getArea() + 
      getCircumference() * getHeight();

} // end function getArea

// calculate Cylinder volume
double Cylinder::getVolume() const
{
   return Circle::getArea() * getHeight();

} // end function getVolume

// output Cylinder object
void Cylinder::print() const
{
   Circle::print();
   cout << "; Height = " << getHeight();

} // end function print

/*Adapted from Deitel & Deitel: C++ How to Program. Fourth edition.
 * Chapter 9
 * Prentice Hall, 2003. 
 */