2015.5.30

#include<iostream>

using namespace std;

class container

{

public:

container(){};

container(doubleradius1)

{

a=radius1;

}

virtualvoid surface_area()=0;

virtualvoid volume()=0;

public:

doublea;

};

class cube:public container

{public:

cube(doubleradius1):container(radius1)

{;}

virtualvoid surface_area()

{

doublex;

x=a*a*6;

cout<<"正方体的面积："<<x<<endl;

}

virtualvoid volume()

{

doubley;

y=a*a*a;

cout<<"正方体的体积："<<y<<endl;

}

};

class sphere:public container

{public:

sphere(doubleradius1):container(radius1)

{;}

virtualvoid surface_area()

{

doublei;

i=4*3.14*a*a;

cout<<"球的表面积："<<i<<endl;

}

virtualvoid volume()

{

doublej;

j=4/3*3.14*a*a*a;

cout<<"球的体积："<<j<<endl;

}

};

class cylinder:public container

{public:

cylinder(doubleradius1,double high):container(radius1)

{

e=high;

}

virtualvoid surface_area()

{

doublep;

p=2*3.14*a*a+2*a*e;

cout<<"圆柱体的表面积："<<p<<endl;

}

virtualvoid volume()

{

doubleq;

q=3.14*a*a*e;

cout<<"圆柱体的体积："<<q<<endl;

}

private:

doublee;

};

int main()

{

cubemb(20),*ma;

spheremp(20),*mc;

cylindermq(20,10),*md;

ma=&mb;

ma->surface_area();

ma->volume();

mc=∓

mc->surface_area();

mc->volume();

md=&mq;

md->surface_area();

md->volume();

return0;

}