第七周实验报告（2）

来源：互联网发布：ovation软件编辑：程序博客网时间：2024/06/06 00:48

#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;}