circle.h

我自己写的代码 可能比较简单 我实现了模拟图层的功能

///////////////////////////////////////////////////////////
//  Circle.h
//  Implementation of the Class Circle
//  Created on:      18-二月-2009 17:17:25
//  Original author: pangyj
///////////////////////////////////////////////////////////

#if !defined(EA_4013DF67_AAB4_4425_AD73_CB7CCF0FDC1E__INCLUDED_)
#define EA_4013DF67_AAB4_4425_AD73_CB7CCF0FDC1E__INCLUDED_

#include "Point2D.h"
#include "ErrorStatus.h"
#include "GeometryPrimitive.h"

class Circle : public GeometryPrimitive
{

public:
	virtual ~Circle();

	Circle();
	Circle(float r, const Point2D& center);
	void center(const Point2D & pt);
	const Point2D & center()const;
	void radius(double r);
	double radius()const;
	virtual ErrorStatus read(fstream& f);
	virtual ErrorStatus write(fstream& f);
	virtual void list()const;

private:
	Point2D centerPt;
	double dRadius;

};
#endif // !defined(EA_4013DF67_AAB4_4425_AD73_CB7CCF0FDC1E__INCLUDED_)