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

class Animal {
 public:
  Animal() : m_isAlive(true) {};
  Animal(bool isAlive) : m_isAlive(isAlive) {};
  bool IsAlive() const { return m_isAlive; };
  void Died() { m_isAlive = false; }
  virtual string Eats() = 0;
 private:
  bool m_isAlive;
};

class Lion : public Animal {
 public:
  Lion() : Animal() {};
  Lion(bool isAlive) : Animal(isAlive) {};
  virtual string Eats() { return "meat"; }
};

class Lamb : public Animal {
 public:
  Lamb() : Animal() {};
  Lamb(bool isAlive) : Animal(isAlive) {};
  virtual string Eats() { return "grass"; }
};

class Shark : public Animal {
 public:
  Shark() : Animal() {};
  Shark(bool isAlive) : Animal(isAlive) {};
  virtual string Eats() { return "people"; }
};

int main() {

  
  Animal *leo = new Lion;
  Animal *lambert = new Lamb;
  Animal *leon = new Shark;

  cout << "The lion eats " << leo->Eats() << endl;

  cout << "The lamb eats " << lambert->Eats() << endl;

  cout << "The shark eats " << leon->Eats() << endl;
  
  return 0;
}