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// Fig. 10.17: circle.cpp
// Circle class member-function definitions.
#include <iostream>
using std::cout;
#include "circle.h" // Circle class definition
// default constructor
Circle::Circle( int xValue, int yValue, double radiusValue )
: Point( xValue, yValue ) // call base-class constructor
{
setRadius( radiusValue );
} // end Circle constructor
// set radius
void Circle::setRadius( double radiusValue )
{
radius = ( radiusValue < 0.0 ? 0.0 : radiusValue );
} // end function setRadius
// return radius
double Circle::getRadius() const
{
return radius;
} // end function getRadius
// calculate and return diameter
double Circle::getDiameter() const
{
return 2 * getRadius();
} // end function getDiameter
// calculate and return circumference
double Circle::getCircumference() const
{
return 3.14159 * getDiameter();
} // end function getCircumference
// override virtual function getArea: return area of Circle
double Circle::getArea() const
{
return 3.14159 * getRadius() * getRadius();
} // end function getArea
// override virutual function getName: return name of Circle
string Circle::getName() const
{
return "Circle";
} // end function getName
// override virtual function print: output Circle object
void Circle::print() const
{
cout << "center is ";
Point::print(); // invoke Point's print function
cout << "; radius is " << getRadius();
} // end function print
/**************************************************************************
* (C) Copyright 1992-2003 by Deitel & Associates, Inc. and Prentice *
* Hall. All Rights Reserved. *
* *
* DISCLAIMER: The authors and publisher of this book have used their *
* best efforts in preparing the book. These efforts include the *
* development, research, and testing of the theories and programs *
* to determine their effectiveness. The authors and publisher make *
* no warranty of any kind, expressed or implied, with regard to these *
* programs or to the documentation contained in these books. The authors *
* and publisher shall not be liable in any event for incidental or *
* consequential damages in connection with, or arising out of, the *
* furnishing, performance, or use of these programs. *
*************************************************************************/
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