#include <iostream>
#include <vector>
#include <cmath>

using namespace std;

template<typename T>
void Swaper(T & a, T & b)
{
    T temp = a;
    a = b;
    b = temp;
}

class Bryla
{    
   private:
    
   public:
       virtual double Objetosc() = 0;
};

class Kula : public Bryla
{
  private:
      int r;
  public:
      Kula(int r = 0)
      {
         this->r = r;
      }

      virtual double Objetosc()
      {
          return 3.14 * r * r * r * 4 / 3.0;
      }
};

class Szescian : public Bryla
{
  private:
      int a;
  public:
      Szescian(int a = 0)
      {
          this->a = a;
      }

      virtual double Objetosc()
      {
          return a * a * a;
      }
};

int main()
{
    vector<Bryla *> vectorek;
    vectorek.push_back(new Kula(5));
    vectorek.push_back(new Szescian(6));
    vectorek.push_back(new Kula(7));
    vectorek.push_back(new Szescian(1));

    int sum = 0;
    for(int i = 0; i < vectorek.size(); ++i)
    {
        sum += vectorek[i]->Objetosc();
    }
    double average = static_cast<double> (sum) / vectorek.size();

    cout << "srednia objetosc = " << average << endl;
    int a = 5, b = 1;

    Swaper(a,b);
    cout << a << ", " << b;

    return 0;
}