/**Copyright(c)2014，烟台大学计算机学院学生*All rights reserved.*文件名称：*作者：马广明*完成日期：2014 年 5 月 27 日*版本号：v1.0*问题描述：求各种立体体积。*输入描述:无。*程序输出：正方体，球体，圆柱体面积及体积*问题分析：*算法设计：*/#include <iostream>using namespace std;const double pi=3.1415926;class CSolib{public:    virtual double area()=0;    virtual double volume()=0;};class CCube:public CSolib{public:    CCube(double bc):bianchang(bc){}    virtual double area();    virtual double volume();private:    double bianchang;};class CBall:public CSolib{public:    CBall(double R):r(R){}    virtual double area();    virtual double volume();private:    double r;};class CCylinde:public CSolib{public:    CCylinde(double R,double H):r(R),h(H){}    virtual double area();    virtual double volume();private:    double r,h;};double CCube::area(){    return 6*bianchang*bianchang;}double CCube::volume(){    return bianchang*bianchang*bianchang;}double CBall::area(){    return 4*pi*r*r;}double CBall::volume(){    return 4/3*pi*r*r*r;}double CCylinde::area(){    return 2*pi*r*r+2*pi*r*h;}double CCylinde::volume(){    return pi*r*r*h;}int main(){    CSolib *pt;    CCube ccube(5);    CBall cball(3.5);    CCylinde ccylinde(3.5,5);    pt=&ccube;    cout<<"正方体面积："<<pt->area()<<endl;    cout<<"正方体体积："<<pt->volume()<<endl;    pt=&cball;    cout<<"球体面积："<<pt->area()<<endl;    cout<<"球体体积："<<pt->volume()<<endl;    pt=&ccylinde;    cout<<"圆柱体面积："<<pt->area()<<endl;    cout<<"圆柱体体积："<<pt->volume()<<endl;    return 0;}