第十周第十一周项目2（3）

/*
*Copyright (c) 2016,烟台大学计算机学院
*All rights reserved.
*文件名称 :
*作    者 : 李钊
*完成日期 : 2016年5月9号
*版 本 号 : v1.0
*
*问题描述 :  点-圆-圆柱类族的设计
*输入描述 :
*程序输出 :求出圆格柱体的表面积、体积并输出并且完成要求的计算任务
*/
#include <iostream>
using namespace std;
class point
{
public:
    point(double x=0,double y=0);
    void setPoint(double,double);
    double getX( ) const {return x;}
    double getY( ) const {return y;}
    void show();
protected:
    double x;
    double y;
};
point::point(double a,double b)
{
    x=a;
    y=b;
}
void point::setPoint(double a,double b)
{
    x=a;
    y=b;

}
void point::show()
{
    cout<<"("<<x<<","<<y<<")"<<endl;
}
class Cirle:public point
{
protected:
    double banjing;
public:
    Cirle(double x=0,double y=0,double r=0);
    void setbanjing(double);
    double getbanjing()const;
    double area()const;
    void show();

};
Cirle::Cirle(double a,double b,double c):point(a,b),banjing(c){}
void Cirle::setbanjing(double c)
{
    banjing=c;
}
double Cirle::area()const
{
     double f;
     f=3.14*banjing*banjing;
     return f;
}
double Cirle::getbanjing()const
{
    return banjing;
}
void Cirle::show()
{
    cout<<"point:"<<"   "<<"("<<x<<","<<y<<")"<<"   "<<"banjing:"<<banjing<<"   "<<area()<<endl;
}
class Yuanzhu:public Cirle
{
protected:
    double height;
public:
    Yuanzhu(double x=0,double y=0,double r=0,double h=0);
    void seth(double);
    double geth()const;
    double area()const;
    double v()const;
    void show();

};
Yuanzhu::Yuanzhu(double a,double b,double c,double d):Cirle(a,b,c),height(d){}
void Yuanzhu::seth(double h)
{
    height=h;
}
double Yuanzhu::geth()const
{
    return height;
}
double Yuanzhu::area()const
{
    double o;
    o=2*Cirle::area()+2*3.14*banjing*height;
    return o;
}
double Yuanzhu::v()const
{
    double t;
    t=Cirle::area()*height;
    return t;

}
void Yuanzhu::show()
{
    cout<<"point:"<<"   "<<"("<<x<<","<<y<<")"<<"   "<<"banjing:"<<banjing<<"   "<<"height:"<<height<<"   "<<"area:"<<area()<<"   "<<"V:"<<v()<<endl;
}

int main()
{
    Yuanzhu f(3.3,4.4,5.5,6.6);
    f.show();
    f.seth(7.7);
    f.show();
    return 0;
}

运行结果：

学习心得：

派生类的运用