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C & C++ Multimedia Cyber Classroom
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C and C++ Multimedia Cyber Classroom (Prentice Hall) (1998).iso
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src
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fig09_10.jar
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Ch09
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Fig09_10
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Circle2.h
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C/C++ Source or Header
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1997-10-26
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561b
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22 lines
// Fig. 9.9: circle2.h
// Definition of class Circle
#ifndef CIRCLE2_H
#define CIRCLE2_H
#include "point2.h"
class Circle : public Point {
friend ostream &operator<<( ostream &, const Circle & );
public:
// default constructor
Circle( double r = 0.0, int x = 0, int y = 0 );
void setRadius( double ); // set radius
double getRadius() const; // return radius
double area() const; // calculate area
protected: // accessible to derived classes
double radius; // radius of the Circle
};
#endif