第七周实验报告（2）

最新推荐文章于 2023-04-07 13:20:24 发布

chenglong831

最新推荐文章于 2023-04-07 13:20:24 发布

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CC 4.0 BY-SA版权

文章标签： distance

本文链接：https://blog.youkuaiyun.com/chenglong831/article/details/7424560

#include<iostream>
#include<Cmath>
using namespace std;
class CPoint  
{
private:
	double x;  // 横坐标 
	double y;  // 纵坐标  
public:
	CPoint(double xx=0, double yy=0):x(xx),y(yy){}
	double distance1(const CPoint &p);
    friend double distance2(const CPoint &p1,const CPoint &p2);
    double getx() const {return x;}
    double gety() const {return y;}
};

double distance3(const CPoint &p1,const CPoint &p2);

double CPoint::distance1(const CPoint &p)
{
	double dx=this->x-p.x;
	double dy=this->y-p.y;
    return sqrt(dx*dx+dy*dy);
}

double distance2(const CPoint &p1,const CPoint &p2)
{
	double dx=p1.x-p2.x;
	double dy=p1.y-p2.y;
	return sqrt(dx*dx+dy*dy);
}

double distance3(const CPoint &p1,const CPoint &p2)
{
	double dx=p1.getx()-p2.getx();
	double dy=p1.gety()-p2.gety();
    return sqrt(dx*dx+dy*dy);
}

int main()
{
	CPoint p1(2,4);
    CPoint p2(3,7);
	cout<<p2.distance1(p1)<<endl;
	cout<<distance2(p1,p2)<<endl;
    cout<<distance3(p1,p2)<<endl;
	system("pause");
	return 0;
}