Conteneur en C++

#include <iostream>
#include <list>

class Device
{
public:
  virtual std::string whoami() const = 0;
};

class Pda : virtual public Device
{
public:
  virtual std::string whoami() const
  {
    return "Pda";
  }
};

class Gsm : virtual public Device
{
public:
  virtual std::string whoami() const
  {
    return "Gsm";
  }
};

class Smartphone : virtual public Pda, virtual public Gsm
{
public:
  virtual std::string whoami() const
  {
    return "Smartphone";
  }
};

int main()
{
  typedef std::list<Device*>::const_iterator iter;
  std::list<Device*> tab;

  tab.push_back(new Pda);
  tab.push_back(new Gsm);
  tab.push_back(new Smartphone);

  for (iter it = tab.begin(); it != tab.end(); ++it)
    std::cout << (*it)->whoami() << std::endl;

  for (iter it = tab.begin(); it != tab.end(); ++it)
    delete *it;

  return 0;
}

  
       ClasseA
      /       \
 ClasseB     ClasseC
      \       /
       ClasseD

class ClasseB : virtual public ClasseA
{
//...

class ClasseD : public ClasseB, public ClasseC
{
//...

class Smartphone : virtual public Pda, virtual public Gsm
{
public:
  virtual std::string whoami() const
  {
    return "Smartphone";
  }
};

class Smartphone : public Pda, public Gsm
{
public:
  virtual std::string whoami() const
  {
    return "Smartphone";
  }
};

#ifndef DEF_DEVICE
#define DEF_DEVICE

class Device
{

    public:

    void characteristicsGSM(int carrierFrequencies, int voiceCodecs, std::string networkStructure, std::string subcriberIdentityModule, std::string phoneLocking, std::string serviceSecurity  );
    void characteristicsPDA(std::string touchScreen, std::string memoryCards, std::string connectivity, std::string synchronization );
    void ascendyDeviceOrderByPrice(int price); //Tri du catalogue par prix croissant
    void searchDeviceByIDmodel(std::string IDmodel); // Recherche d'un appareil dont on connait le modèle


    private:

    std::string objetType;
    std::string mark;
    std::string IDmodel;
    int price;


};

#endif