#include <iostream>
#include <string>

using namespace std;

class AnimalT {
    public:
       virtual ~AnimalT() = default;
       virtual void Birthday() = 0;

       virtual int Age() {
          return age;
       }

       virtual void Move() { 
          cout << "I am moving as an animal" << endl;
       }

    protected:
       int age{0};
};

class BirdT: public virtual  AnimalT  {
//class BirdT: public  AnimalT  {
    public:
        int Age() override {
           cout << "My Age as a bird is " << AnimalT::Age() << endl;
           return age;
        }

        void Birthday() override {
            cout << "tweet tweet I am two years older" << endl;
            age += 2;
        }
};

class DogT: public virtual AnimalT  {
//class DogT: public AnimalT  {
    public:
        int Age() override {
           cout << "My Age as a dog is " << AnimalT::Age() << endl;
           return age;
        }

        void Birthday() override {
            cout << "woof woof, I am a year older" << endl;
            age += 1;
        }
};

class BirdDogT: public BirdT, public DogT {
    public:
        int Age() override {
            BirdT::Age();
            DogT::Age();

            
 //           return BirdT::age + DogT::age;
              return age;
        }

        void Birthday() override{ 
            BirdT::Birthday();          
            DogT::Birthday();  
        }

};

int main() {
      BirdDogT pet;

      cout << "New Pet" << endl;
      pet.Age();
      cout << endl << endl;

      cout << "Happy Birthday dear pet" << endl;
      pet.Birthday();
      pet.Age();


      cout << endl << endl;
      cout << "I am going to move " << endl;

// I didn't know you could do this!
      pet.DogT::Move();
      pet.BirdT::Move();
      pet.AnimalT::Move();
      pet.Move();
      return 0;
}