/* (程序頭部註釋開始)
* 程序的版權和版本聲明部分
* Copyright (c) 2011, 煙臺大學計算機學院學生
* All rights reserved.
* 文件名稱: 第六週 任務三
* 作 者: 楊森
* 完成日期: 2012 年 3 月 27 日
* 版 本 號: v1.0
* 對任務及求解方法的描述部分
* 輸入描述:
* 問題描述:
* 程序輸出:
* 程序頭部的註釋結束
#include<iostream>
#include<cmath>
using namespace std;
enum SymmetricStyle {axisx, axisy, point}; //分別表示按x軸, y軸, 原點對稱
class CPoint
{
private:
double x; // 橫座標
double y; // 縱座標
public:
CPoint(double xx=0, double yy=0);
double Distance(CPoint p) const; // 兩點之間的距離(一點是當前點,另一點爲參數p)
double Distance0() const; // 到原點的距離
CPoint SymmetricAxis(SymmetricStyle style) const; // 返回對稱點
void input(); //以x,y 形式輸入座標點
void output(); //以(x,y) 形式輸出座標點
};
CPoint::CPoint(double xx, double yy):x(xx),y(yy){}
int main()
{
CPoint c1, c2;
c1.input();
c2.input();
c1.output();
c2.output();
cout << "兩點間的距離是:" << c1.Distance(c2) << endl;
cout << "點到原點的距離是:" << c2.Distance0() << endl;
c1.SymmetricAxis(axisx);
c1.SymmetricAxis(axisy);
c1.SymmetricAxis(point);
system("pause");
}
CPoint CPoint::SymmetricAxis(SymmetricStyle style) const
{
switch(style)
{
case(axisx):
{
cout << "點" << "(" << x << "," << y << ")"<< "關於X軸對稱點是: (" << x << "," << - y << ")" << endl;
break;
}
case(axisy):
{
cout << "點" << "(" << x << "," << y << ")" << "關於Y軸對稱點是: (" << - x << "," << y << ")" << endl;
break;
}
default:
{
cout << "點" << "(" << x << "," << y << ")"<< "關於原點對稱點是: (" << - x << "," << - y << ")" << endl;
break;
}
}
return (x, y);
}
double CPoint::Distance(CPoint p) const
{
return sqrt((p.x - x) * (p.x - x) + (p.y - y) * (p.y - y));
}
double CPoint::Distance0() const
{
return sqrt(x * x + y * y);
}
void CPoint::input()
{
char c;
cout << "請輸入點座標:(格式:x,y)" << endl;
do
{
cin >> x >> c >> y;
if(c == ',')
{
break;
}
cout << "格式不正確,請重新輸入:" << endl;
}while(1);
}
void CPoint::output()
{
cout << "點座標(" << x << "," << y << ")" << endl;
}
小感: const 還需要深入理解和好好運用啊