text: #ifndef ELEMENT_H
  #define ELEMENT_H
  
  #include <iostream>
  #include "Node.h"
  
  class Element
  {
  public:
      int no;
      Node *node1;
      Node *node2;
  
  public:
      Element(int _no, Node *_node1, Node *_node2)
          : no(_no), node1(_node1), node2(_node2)
      {
      }
      friend std::ostream &operator<<(std::ostream &out, Element const &obj);
  };
  
  #endif
  