第十周任务三

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/* (程序头部注释开始)
* 程序的版权和版本声明部分
* Copyright (c) 2011, 烟台大学计算机学院学生
* All rights reserved.
* 文件名称：
* 作者：李超
* 完成日期： 2012 年 4 月 25 日
* 版本号： 01.10.03

* 对任务及求解方法的描述部分

* 程序输出：

坐标为：(1,2)
圆ci：坐标为：(1,2)半径为：3
改变后的圆ci:坐标为：(4,5)半径为：6
圆柱cl:坐标为：(2,3)半径为：1高为：4
改变后的圆柱cl:坐标为：(4,5)半径为：6高为：7

* 程序头部的注释结束

*感言：该题好麻烦，最终还是不知道析构函数怎么弄

头文件LCylinder.h

#include <iostream>using namespace std;double P = 3.14159;class Point{public:Point(double x1 = 0, double y1 = 0): x(x1), y(y1){}//数据初始化friend ostream & operator << (ostream &, Point &);//重载<<void Change1(double x1,double y1){x = x1;y = y1;}//改变数据double GetX(){return x;}//得到xdouble GetY(){return y;}//得到yprivate:double x;//横坐标double y;//纵坐标};class Circle:public Point{public:Circle (double x1 = 0, double y1 = 0, double r1 = 1):Point(x1, y1),r(r1){}double GetR(){return r;}//得到半径void Change2 (double x1,double y1,double r1){Change1(x1,y1);r = r1;}//改变数据friend ostream & operator <<(ostream &, Point &);//重载<<private:double r;//半径};class Cylinder:public Circle{public:Cylinder(double x1 = 0, double y1 = 0,double r1 = 1, double h1 = 1):Circle (x1, y1, r1), h(h1){}double GetH(){return h;}//得到高double Area();//计算圆柱面积double Volume();//计算圆柱体积void Change3(double x1,double y1,double r1,double h1){Change2(x1,y1,r1);h = h1;}//改变数据friend ostream & operator << (ostream &, Cylinder & c);//重载<<private:double h;//高};ostream & operator << (ostream &output, Point & c){output <<"坐标为：" <<'(' <<c.GetX ()<<',' <<c.GetY () <<')';return output;}ostream & operator << (ostream &output, Circle & c){output <<"坐标为：" <<'(' <<c.GetX () <<',' <<c.GetY () <<')' <<"半径为：" <<c.GetR ();return output;}ostream & operator << (ostream &output, Cylinder & c){output <<"坐标为：" <<'(' <<c.GetX () <<',' <<c.GetY () <<')' <<"半径为：" <<c.GetR () <<"高为：" <<c.GetH ();return output;}double Cylinder::Area(){return (2 * GetR () * GetR () * P + 2 * P * GetR () * h);}double Cylinder::Volume(){return (2 * GetR () * GetR () * P * h);}

主函数main.cpp

#include <iostream>#include"LCylinder.h"using namespace std;void main(){Point p1(1,2);cout <<p1 <<endl;Circle ci(1,2,3);cout <<"圆ci：" <<ci <<endl;ci.Change2 (4,5,6);cout<<"改变后的圆ci:" <<ci <<endl;Cylinder cl(2,3,1,4);cout <<"圆柱cl:";cout <<cl <<endl;cl.Change3 (4,5,6,7);cout <<"改变后的圆柱cl:";cout <<cl <<endl;system("pause");}