立体类族共有的抽象类

01.01.01.//02.* Copyright (c) 2013, 烟台大学计算机学院         
02.02.02.//04.* 作    者: 马德鹏         
03.03.03.//05.* 完成日期:2014 年 5 月 29 日         
04.04.04.//06.* 版 本 号:v1.0         
05.05.05.//07.*
#include <iostream>
const double PI=3.14;
using namespace std;
class CSolid
{
public:
    virtual void area()const=0;
    virtual void volume()const=0;
};
class CCube:public CSolid
{
public:
    CCube(int l,int w,int h):lon(l),wide(w),hight(h) {}
    void area()const
    {
        long m;
        m=lon*wide*2+lon*hight*2+wide*hight*2;
        cout<<"正方体的表面积为:"<<m<<endl;
    }
    void volume()const
    {
        long n;
        n=lon*wide*hight;
        cout<<"正方体的体积为:"<<n<<endl;
    }
private:
    int lon,wide,hight;
};
class CBall:public CSolid
{
public:
    CBall(double r):R(r) {}
    void area()const
    {
        double x;
        x=4*PI*R*R;
        cout<<"球体的表面积为:"<<x<<endl;
    }
    void volume()const
    {
        double y;
        y=(4*PI*R*R)/3;
        cout<<"球体的体积为:"<<y<<endl;
    }
private:
    double R;
};
class CCylinder:public CSolid
{
public:
    CCylinder(double r,int h):R(r),hight(h) {}
    void area()const
    {
        double z;
        z=PI*R*R+PI*R*hight;
        cout<<"圆柱体表面积为:"<<z<<endl;
    }
    void volume()const
    {
        double s;
        s=(PI*R*R)/2*hight;
        cout<<"圆柱体表体积为:"<<s<<endl;
    }
private:
    double R;
    int hight;
};
int main()
{
    CSolid *p;
    CCube c1(3,4,5);
    p=&c1;
    p->area();
    p->volume();
    CBall c2(3.14);
     p=&c2;
    p->area();
    p->volume();
    CCylinder c3(1.2,3);
    p=&c3;
    p->area();
    p->volume();
    return 0;
}

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转载自blog.csdn.net/u012369154/article/details/27543031