第六周作业

//【任务3】设计平面坐标点类，计算两点之间距离、到原点距离、关于坐标轴和原点的对称点等
#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 = 0,double yy = 0) : x(xx), y(yy){};
void Distance(CPoint p) const; // 两点之间的距离(一点是当前点，另一点为参数p)
void Distance0() const;       // 到原点的距离
CPoint SymmetricAxis(SymmetricStyle style) const; // 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 CPoint :: 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 d;
d = sqrt((p.x - x) * (p.x - x) + (p.y - y) * (p.y - y));
cout << "两点之间的距离:" << d << endl;
}

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

CPoint CPoint::SymmetricAxis(SymmetricStyle style) const   // 返回对称点
{
switch(style)
{
case axisx:  cout << "(" << x << "," << -y << ")" << endl ; break;
case axisy: cout << "(" << -x << "," << y << ")" << endl; break;
case point:cout << "(" << -x << "," << -y << ")" << endl; break;
}
return(x,y);
}

void CPoint :: input() //以x,y 形式输入坐标点
{
char c1, c2, c3;
cout << "请输入坐标（形式 (x,y)）";
do
{
cin >> c1 >> x >> c2 >> y >> c3;
if(c1 != '(' || c2 != ',' || c3 != ')')cout << "请重新输入（形式 x,y）";
else break;
}while(1);
}

void CPoint :: output() //以(x,y) 形式输出坐标点
{
cout << "(" << x << "," << y << ")" << endl;
}

int main()
{
CPoint c1, c2;
c1.input();

cout << "请再输入一个点" << endl;
c2.input();
c1.Distance(c2);

c1.Distance0();

c1.SymmetricAxis(axisx);

c1.SymmetricAxis(axisy);

c1.SymmetricAxis(point);

return 0;
}