class wenzel
{
  public:
      wenzel();
      ~wenzel()
      class wenzel *insert(class wenzel *root);
      class wenzel *get_next_addr();
      class wenzel *get_addr();
      int get_value();
      int set_value();
  private:
      class wenzel *adrr;
      class wenzel *next_addr;
      int value;
}