using namespace std:
#include<list>
class Dog
{
int weight;
int color;
char *name;

public:
Dog(char *name);
Cry();
}

class Puppy : class Dog
{
public:
Puppy(char *name);
}

main()
{
list<Dog&> dogs;
dogs.add(new Puppy("buddy"));
dogs.add(new Dog("carrot"));
....
}