第十三周项目3 立体类族共有的抽象类

/*
*Copyright(c)2014,烟台大学计算机学院
*All rights reserved.
*文件名称：test.cpp
*作者：曾晓
*完成日期：2015年 6月 2日
*版本号：v1.0
*/
#include <iostream>
using namespace std;
class CSolid
{
public:
virtual double area()=0;
virtual double volume()=0;
};
class CCube:public CSolid
{
public:
CCube(double l):length(l) {}
double area();
double volume();
private:
double length;
};
double CCube::area()
{
return 6*length*length;
}
double CCube::volume()
{
return length*length*length;
}
class CBall:public CSolid
{
public:
CBall(double r):radius(r) {}
double area();
double volume();
private:
double radius;
};
double CBall::area()
{
return 4*3.14159*radius*radius;
}
double CBall::volume()
{
return 3.14159*radius*radius*radius*4/3;
}
class CCylinder:public CSolid
{
public:
CCylinder(double r,double h):radius(r),height(h) {}
double area();
double volume();
private:
double radius;
double height;
};
double CCylinder::area()
{
return 2*3.14159*radius*height+2*3.14159*radius*radius;
}
double CCylinder::volume()
{
return 3.14159*radius*radius*height;
}
int main()
{
CSolid *p;
CCube a(2.5);
cout<<"正方体的边长为2.5"<<endl;
p=&a;
double s1=p->area();
double v1=p->volume();
cout<<"正方体的表面积为："<<s1<<endl;
cout<<"正方体的体积为："<<v1<<endl;
CBall b(3.5);
cout<<"球体的半径为3.5"<<endl;
p=&b;
double s2=p->area();
double v2=p->volume();
cout<<"球体的表面积为："<<s2<<endl;
cout<<"球体的体积为："<<v2<<endl;
CCylinder c(4.5,1.5);
cout<<"圆柱体的底面半径为4.5,高为1.5"<<endl;
p=&c;
double s3=p->area();
double v3=p->volume();
cout<<"圆柱体的表面积为："<<s3<<endl;
cout<<"圆柱体的体积为："<<v3<<endl;
return 0;
}