#include <iostream>
#include <string>
using namespace std;

class Animal
{
public:
    Animal();
    Animal(string name, int limbs);

    string Name;
    int Limbs;

    void Description();
};

class Dog : public Animal
{
public:
    Dog();
    Dog(string name, int limbs);
};

int main()
{
    // Will print: "An ANIMAL is born!"
    // and "A DOG is born!"
    // Dog dog;

    // Will still print: "An ANIMAL is born!"
    // and "I am a Spot with 4 limbs."
    // (NB: Empty Animal() constructor always called)
    Dog dog("Spot", 4);

    system("pause");
}

Animal::Animal()
{
    cout << "An ANIMAL is born!" << endl;

    Name = "Default";
    Limbs = 2;
}

Animal::Animal(string name, int limbs) :
    Name(name), Limbs(limbs)
{
    // Additional stuff could be executed here.
}

void Animal::Description()
{
    cout << endl;
    cout << "I am a " << Name << " with " << Limbs << " limbs." << endl;
    cout << endl;
}

Dog::Dog()
{
    cout << "A DOG is born!" << endl;
}

Dog::Dog(string name, int limbs)
{
    Name = name;
    Limbs = limbs;
    Description();
}