how to change code in object oriented for polymorphism

[siemprepeligroso]

could someone pls help me to make some changes in this code
, instead of CIRCLE and CONUS I want it to function for Triangle and Pyramid...also include this polymorphism concepts:
1) virtual function
2) pure virtual functions
3) main program:
i) base class pointer-> base class object
ii) derived class pointer-> base class object

this is the code:

circle1.h
// abstract base class circle

#ifndef CIRCLE1_H
#define CIRCLE1_H

class Circle{
public:
Circle(double =0, double =0, float =0);
virtual float volume() = 0;//pure virtual function
virtual void print();
void set(double,double, float);
float perimeter();
float surface ();
float getx();
float gety();
float getR();
private:
double x,y;
float r;
};

#endif

circle1.cpp
#include<iostream>
#include<cmath>
using namespace std;
#include "circle1.h"
const float pi=3.14;
Circle::Circle(double xx, double yy, float rr)
{
set(xx,yy, rr);
}

// print()
void Circle::print()
{
cout<<"\n Centar so koordinati ("<<getx()<<","<<gety()<<
")"<<endl; // -direktno x, y moze: x i y

cout<<"\nRadius r="<<r
<<"\nPerimeter P="<<perimeter()
<<"\nSurface S="<<surface()
<<endl;}

float Circle::perimeter()
{
return 2*r*pi ;
}

float Circle::surface()
{
return r*r*pi;}

float Circle:: getx()
{return x;}

float Circle:: gety()
{return y;}

float Circle:: getR()
{return r;}

void Circle::set(double xx, double yy, float rr)
{
//C.x=xx; nuk mundet sepse eshte private
//C.y=yy;nuk mundet sepse eshte private
x=xx; y= yy;
r=rr;
}


conus.h
#ifndef CONUS_H
#define CONUS_H
#include "circle1.h"

class Conus : public Circle{
private:
float h;
public:
Conus(double =0.0, double =0.0, float =0.0, float =0.0);
void set(double x1, double y1, float r1, float h1);
float geth();
float surface();
virtual float volume();
virtual void print();
};
#endif


conus.cpp
#include <iostream>
#include <cmath>
using namespace std;
#include "conus.h"
#include "circle1.h"
Conus::Conus(double x1, double y1, float r1, float h1):Circle(x1,y1,r1)
{h=h1;}
void Conus::set(double x1, double y1, float r1, float h1)
{
Circle::set(x1,y1,r1);
h=h1;
}
float Conus::geth(){return h;}
float Conus::surface()
{
return Circle::surface()+perimeter()*h;
}
float Conus::volume()
{
return Circle::surface()*h/3;
}
void Conus::print()
{
cout<<"\n Conus so osnova so :";
Circle::print();
cout<<"\n Visina="<<geth()
<<"\n Polshtina na conus"<<surface()
<<"\n Volumen ="<<volume()
<<endl;
}


main.cpp
#include <iostream>
#include <cmath>
using namespace std;
#include "circle1.h"
#include "conus.h"

int main()
{
Circle *Cptr=0;
Conus K, *Kptr=0;
K.set(3,5,4.5,6);
Circle C

Kptr=&K;

K.print();
Kptr->print();


Cptr->print();

cin.get();
return 0;

}

[Disch]

if( poster.IsAskingForHomeworkSolution() )
{
  if( !poster.DidAttemptProblemOnHisOwn() )
  {
    int ridiculefactor = 10;

    if( poster.IsHomeworkRequestBlatantlyObvious() )
      ridiculefactor *= 2;

    me.RidiculePoster( poster, ridiculefactor );
  }
}

[Bazzy]

@Disch
There is an error in your code, line 5 should be double ridiculefactor = numeric_limits<double>::infinity();