text: #ifndef ZOO
  #define ZOO
  
  #include "zwierze.h"
  #include<iostream>
  
  class Pies : public Zwierze {
      public:
          void dajGlos() { std::cout << "Hau hau\n"; }
          Pies() = default;
          ~Pies() = default;
  };
  
  class Kot : public Zwierze {
      public:
          void dajGlos() { std::cout << "Miau miau\n"; }
          Kot() = default;
          ~Kot() = default;
  };
  
  
  class Swinia : public Zwierze {
      public:
          void dajGlos() { std::cout << "Chrum chrum\n"; }
          Swinia() = default;
          ~Swinia() = default;
  };
  
  #endif 
  