#include <iostream>

using namespace std;

class Point

{

public:

 Point(float=0,float=0);

 void setPoint(float,float);

 float getX() const {return x;}

 float getY() const {return y;}

 friend ostream & operator<<(ostream &,const Point &);

protected:

 float x,y;

};

Point::Point(float a,float b)

{x=a;y=b;}

void Point::setPoint(float a,float b)

{x=a;y=b;}

ostream & operator<<(ostream &output,const Point &p)

{output<<"["<<p.x<<","<<p.y<<"]"<<endl;

return output;

}

class Circle:public Point

{public:

Circle(float x=0,float y=0,float r=0);

void setRadius(float);

float getRadius() const;

float area () const;

friend ostream &operator<<(ostream &,const Circle &);

protected:

 float radius;

};

Circle::Circle(float a,float b,float r):Point(a,b),radius(r){}

void Circle::setRadius(float r)

{radius=r;}

float Circle::getRadius() const {return radius;}

float Circle::area() const

{return 3.14159*radius*radius;}

ostream &operator<<(ostream &output,const Circle &c)

{output<<"Center=["<<c.x<<","<<c.y<<"], r="<<c.radius<<", area="<<c.area()<<endl;

return output;

}

class Cylinder:public Circle

{public:

Cylinder (float x=0,float y=0,float r=0,float h=0);

void setHeight(float);

float getHeight() const;

float area() const;

float volume() const;

friend ostream& operator<<(ostream&,const Cylinder&);

protected:

 float height;

};

Cylinder::Cylinder(float a,float b,float r,float h)

:Circle(a,b,r),height(h){}

void Cylinder::setHeight(float h){height=h;}

float Cylinder::getHeight() const {return height;}

float Cylinder::area() const

{ return 2*Circle::area()+2*3.14159*radius*height;}

float Cylinder::volume() const

{return Circle::area()*height;}

ostream &operator<<(ostream &output,const Cylinder& cy)

{output<<"Center=["<<cy.x<<","<<cy.y<<"], r="<<cy.radius<<", h="<<cy.height

<<"\narea="<<cy.area()<<", volume="<<cy.volume()<<endl;

return output;

}

int main()

{Cylinder cy1(3.5,6.4,5.2,10);

cout<<"\noriginal cylinder:\nx="<<cy1.getX()<<", y="<<cy1.getY()<<", r="

<<cy1.getRadius()<<", h="<<cy1.getHeight()<<"\narea="<<cy1.area()

<<", volume="<<cy1.volume()<<endl;

cy1.setHeight(15);

cy1.setRadius(7.5);

cy1.setPoint(5,5);

cout<<"\nnew cylinder:\n"<<cy1;

Point &pRef=cy1;

cout<<"\npRef as a point:"<<pRef;

Circle &cRef=cy1;

cout<<"\ncRef as a Circle:"<<cRef;

return 0;

}