text: #ifndef DRONE_H
  #define DRONE_H
  
  #include <functional>
  
  class Pizza;
  
  class Drone {
      float lat;
      float lon;
      float alt;
      Pizza* pizza;
      void move(float, float);
      void changeAltitude(float);
  public:
      static float cruising_altidude;
      Drone(float, float, float);
      bool load(Pizza* p);
      void flyTo(float, float, float);
      Pizza* release();
      ~Drone();
  };
  
  #endif
  