标签:blog class code int get 2014
#include<iostream>
#include<Cmath>
using namespace std;
class Point //定义坐标点类
{
public:
Point():x(0),y(0) {};
Point(double x0, double y0):x(x0),y(y0){};
void PrintPoint(); //输出点的信息
double getx()
{
return x;
}
double gety()
{
return y;
}
protected:
double x,y; //点的横坐标和纵坐标
};
void Point::PrintPoint()
{
cout<<"Point: ("<<x<<","<<y<<")"; //输出点
}
class Line: public Point //利用坐标点类定义直线类, 其基类的数据成员表示直线的中点
{
public:
Line(Point pts, Point pte); //构造函数,用初始化直线的两个端点及由基类数据成员描述的中点
double Length(); //计算并返回直线的长度
void PrintLine(); //输出直线的两个端点和直线长度
private:
class Point pts,pte; //直线的两个端点,从Point类继承的数据成员表示直线的中点
};
double Line::Length()
{
return sqrt(pow((pts.getx()-pte.getx()),2)+pow((pts.gety()-pte.gety()),2));
}
void Line::PrintLine()
{
cout<<"1st ("<<pts.getx()<<","<<pts.gety()<<")"<<endl;
cout<<"2nd ("<<pte.getx()<<","<<pte.gety()<<")"<<endl;
cout<<"长度:"<<Length()<<endl;
}
Line::Line(Point ps, Point pe):Point((ps.getx()+pe.getx())/2,(ps.gety()+pe.gety())/2)
{
pts=ps;
pte=pe;//这一段不是太懂
}
int main()
{
Point ps(-2,5),pe(7,9);
Line l(ps,pe);
cout<<"About the Line: "<<endl;
l.PrintLine(); //输出直线l的信息:两端点及长度
cout<<"The middle point of Line is: "<<endl;
l.PrintPoint(); //输出直线l中点的信息
return 0;
}
标签:blog class code int get 2014
原文地址:http://blog.csdn.net/zjx211314/article/details/25196729