/*8.5	以點（point）類為基類，重新定義矩形類和圓類。點為直角坐標(biāo)點，矩形水平放置，由左下方
的頂點和長寬定義。圓由圓心和半徑定義。派生類操作判斷任一坐標(biāo)點是在圖形內(nèi)，還是在圖形的邊緣
上，還是在圖形外。缺省初始化圖形退化為點。要求包括拷貝構(gòu)造函數(shù)。編程測試類設(shè)計是否正確。*/
#include <iostream>
#include <cmath>
using namespace std;
const double PI=3.1415926535;
class Point{
private:
	double x,y;
public:
	Point(){x = 0; y = 0; }
	Point(double xv,double yv){x = xv;y = yv;}
	Point(Point& pt){ x = pt.x; y = pt.y; }
	double getx(){return x;}
	double gety(){return y;}
	double Area(){return 0;}
	void Show(){cout<<"x="<<x<<' '<<"y="<<y<<endl;}
};
class Circle :public Point{
	double radius;
public:
	Circle(){radius = 0;}
	Circle(double xv,double yv,double vv):Point(xv,yv){radius = vv;}
	Circle(Circle& cc):Point(cc){radius = cc.radius;}  //拷貝構(gòu)造函數(shù)	
	double Area(){return PI*radius*radius;}
	void Show(){
		cout<<"x="<<getx()<<'\t'<<"y="<<gety()<<'\t'<<"radius="<<radius<<endl;//訪問基類的數(shù)據(jù)成員
	}
	int position(Point &pt){
	double distance = sqrt((getx()-pt.getx())*(getx()-pt.getx())
		                    +(gety()-pt.gety())*(gety()-pt.gety()));
    double s=distance-radius;
	if(s==0) return 0;    //在圓上
	else if(s<0) return -1;					//在圓內(nèi)
	else return 1;									//在圓外
	}
};
class Rectangle:public Point{
	double width,length;
public:
	Rectangle(){width=0; length=0; }
	Rectangle(double xv,double yv,double wv,double lv):Point(xv,xv)	{
		width = wv;
		length= lv;
	}
	Rectangle(Rectangle& rr):Point(rr){
		width = rr.width;
		length = rr.length;
	}
	double Area(){return width*length;}
	void Show(){
		cout<<"x="<<getx()<<'\t'<<"y="<<gety()<<'\t';
		cout<<"width="<<width<<'\t'<<"length="<<length<<endl;
	}
	int position(Point &pt);
};
int Rectangle::position(Point &pt){
	double s1,s2;
	s1 = (pt.getx()-getx()); s2=(pt.gety()-gety());
	if(((s1==0||s1==width)&&s2<=length)||((s2==0||s2==length)&&s1<=width)) return 0; //在矩形上
	else if(s1<width&&s2<length) return -1;					//在矩形內(nèi)
	else return 1;									//在矩形外
}
int main(){
	Circle cc1(3,4,5),cc2,cc3(cc1);
	Rectangle rt1(0,0,6,8),rt2,rt3(rt1);
	Point p1(0,0),p2(6,8),p3(3,3),p4(8,4),p5(8,8);
	cc1.Show();
	cc2.Show();
	rt1.Show();
	rt2.Show();
	cout<<"點p1:";
	p1.Show();
	cout<<"矩形rt3:"<<'\t';
	rt3.Show();
	switch(rt3.position(p1)){
	case 0:cout<<"在矩形上"<<endl;break;
	case -1:cout<<"在矩形內(nèi)"<<endl;break;
	case 1:cout<<"在矩形外"<<endl;break;
	}
	cout<<"圓cc3:"<<'\t';
	cc3.Show();
	switch(cc3.position(p1)){
	case 0:cout<<"在圓上"<<endl;break;
	case -1:cout<<"在圓內(nèi)"<<endl;break;
	case 1:cout<<"在圓外"<<endl;break;
	}
	cout<<"點p2:";
	p2.Show();
	cout<<"矩形rt3:"<<'\t';
	rt3.Show();
	switch(rt3.position(p2)){
	case 0:cout<<"在矩形上"<<endl;break;
	case -1:cout<<"在矩形內(nèi)"<<endl;break;
	case 1:cout<<"在矩形外"<<endl;break;
	}
	cout<<"圓cc3:"<<'\t';
	cc3.Show();
	switch(cc3.position(p2)){
	case 0:cout<<"在圓上"<<endl;break;
	case -1:cout<<"在圓內(nèi)"<<endl;break;
	case 1:cout<<"在圓外"<<endl;break;
	}
	cout<<"點p3:";
	p3.Show();
	cout<<"矩形rt3:"<<'\t';
	rt3.Show();
	switch(rt3.position(p3)){
	case 0:cout<<"在矩形上"<<endl;break;
	case -1:cout<<"在矩形內(nèi)"<<endl;break;
	case 1:cout<<"在矩形外"<<endl;break;
	}
	cout<<"圓cc3:"<<'\t';
	cc3.Show();
	switch(cc3.position(p3)){
	case 0:cout<<"在圓上"<<endl;break;
	case -1:cout<<"在圓內(nèi)"<<endl;break;
	case 1:cout<<"在圓外"<<endl;break;
	}
	cout<<"點p4:";
	p4.Show();
	cout<<"矩形rt3:"<<'\t';
	rt3.Show();
	switch(rt3.position(p4)){
	case 0:cout<<"在矩形上"<<endl;break;
	case -1:cout<<"在矩形內(nèi)"<<endl;break;
	case 1:cout<<"在矩形外"<<endl;break;
	}
	cout<<"圓cc3:"<<'\t';
	cc3.Show();
	switch(cc3.position(p4)){
	case 0:cout<<"在圓上"<<endl;break;
	case -1:cout<<"在圓內(nèi)"<<endl;break;
	case 1:cout<<"在圓外"<<endl;break;
	}
	cout<<"點p5:";
	p5.Show();
	cout<<"矩形rt3:"<<'\t';
	rt3.Show();
	switch(rt3.position(p5)){
	case 0:cout<<"在矩形上"<<endl;break;
	case -1:cout<<"在矩形內(nèi)"<<endl;break;
	case 1:cout<<"在矩形外"<<endl;break;
	}
	cout<<"圓cc3:"<<'\t';
	cc3.Show();
	switch(cc3.position(p5)){
	case 0:cout<<"在圓上"<<endl;break;
	case -1:cout<<"在圓內(nèi)"<<endl;break;
	case 1:cout<<"在圓外"<<endl;break;
	}
	return 0;
}