//
// main.cpp
// circlec++
//
// Created by duanqibo on 2019/7/12.
// Copyright © 2019年 duanqibo. All rights reserved.
//
#include <iostream>
using namespace std;
const double PI=3.14159;
class circle
{
private:
double radius;
public:
circle(double r)
{
radius=r;
}
virtual double area()
{
return 0.0;
}
virtual double volume()
{
return 0.0;
}
double getRadius()
{
return radius;
}
};
class sphere:public circle
{
public:
sphere(double r):circle(r){};
double area()
{
return 4.0*PI*getRadius()*getRadius();
}
double volume()
{
return 4.0*PI*getRadius()*getRadius()*getRadius()/3;
}
};
class column:public circle
{
private:
double height;
public:
column(double r,double h):circle(r)
{
height=h;
}
double area()
{
return 2.0*PI*getRadius()*(getRadius()+height);
}
double volume()
{
return PI*getRadius()*getRadius()*height;
}
};
int main(int argc, const char * argv[])
{
circle *p;
sphere sobj(2.0);
p=&sobj;
/////////////////////////////
cout<<"球体："<<endl;
cout<<"球体体积："<<p->volume()<<endl;
cout<<"球体表面积："<<p->area()<<endl;
/////////////////////////////
column cobj(3,5);
p=&cobj;
cout<<"圆柱体："<<endl;
cout<<"圆柱体体积："<<p->volume()<<endl;
cout<<"圆柱体表面积："<<p->area()<<endl;
return 1;
}
运行结果：
