第六周实验报告 任务三

#include<iostream>
#include<cmath>
using namespace std;
enum SymmetricStyle { axisx,axisy,point};//分别表示按x轴, y轴, 原点对称
class CPoint
{
private:
 double x;  // 横坐标
 double y;  // 纵坐标
public:
 CPoint(double xx=1,double yy=2):x(xx),y(yy){}
 double Distance(CPoint p) const;   // 两点之间的距离(一点是当前点，另一点为参数p)
 double Distance0() const;          // 到原点的距离
 CPoint SymmetricAxis(SymmetricStyle style);   // 返回对称点
 void input();  //以x,y 形式输入坐标点
 void output(); //以(x,y) 形式输出坐标点
};
void main()
{
 
 CPoint a1;
 CPoint a2;
 a1.input();
 a1.output();
 a1.Distance0();
 a1.Distance(a2);
 a1.SymmetricAxis(axisx);
 a1.SymmetricAxis(axisy);
 a1.SymmetricAxis(point);
 system("pause");
}

 

void CPoint::input()  //以x,y 形式输入坐标点
{
 char a;
 cout<<"请以“x,y ”形式输入坐标点:"<<endl;
 cin>>x>>a>>y;
 if(a!=',')
 {
  exit(0);
 }
}
void CPoint::output() //以(x,y) 形式输出坐标点
{
 cout<<"("<<x<<","<<y<<")"<<endl;
}

double CPoint::Distance0() const  // 到原点的距离
{
 cout<<"到原点的距离："<<endl;
 cout<<sqrt(x*x+y*y)<<endl;
 return 0;
}

double CPoint::Distance(CPoint p) const   
 cout<<"与默认点的距离为："<<endl;
 cout<<sqrt((x-p.x)*(x-p.x)+(y-p.y)*(y-p.y))<<endl;
 return 0;
}
CPoint CPoint::SymmetricAxis(SymmetricStyle style)  // 返回对称点
{
 if(style == axisx)
 {
  y = -y;
 }
 
 if(style == axisy)
 {
  x = -x;
 }
 
 if(style == point)
 {
  x = -x;
  y = -y;
 }
 switch(style)
 {
 case axisx:cout<<"关于x轴的对称点：("<<x<<","<<y<<")"<<endl;break;
 case axisy:cout<<"关于y轴的对称点：("<<x<<","<<y<<")"<<endl;break;
 case point:cout<<"关于原点的对称点：("<<x<<","<<y<<")"<<endl;break;
 default:break;
 }
 return 0;
}

this指针运用不太会，代码部分借鉴..