reversing-part-2-1.cpp

#include <iostream>
#include <cstdlib>

struct Mammal {
  Mammal() { std::cout << "Mammal::Mammal\n"; }
  virtual ~Mammal() {}
  virtual void walk() { std::cout << "Mammal::walk\n"; }
};

struct Cat : Mammal {
  Cat() { std::cout << "Cat::Cat\n"; }
  virtual ~Cat() {}
  virtual void walk() { std::cout << "Cat::walk\n"; }
};

struct Dog : Mammal {
  Dog() { std::cout << "Dog::Dog\n"; }
  virtual ~Dog() {}
  virtual void walk() { std::cout << "Dog::walk\n"; }
};

struct Bird {
  Bird() { std::cout << "Bird::Bird\n"; }
  virtual ~Bird() {}
  virtual void fly() { std::cout << "Bird::fly\n"; }
};

//NOTE: this may not be taxonomically correct
struct Bat : Bird, Mammal {
  Bat() { std::cout << "Bat::Bat\n"; }
  virtual ~Bat() {}
  virtual void fly() { std::cout << "Bat::fly\n"; }
};

int main() {
  Bird *b;
  Mammal* m;
  if (rand() % 2) {
    b = new Bat();
    m = new Cat();
  } else {
    b = new Bird();
    m = new Dog();
  }
  b->fly();
  m->walk();
}