/***************************************************************************
			zadanie domowe nr: 	3
			plik:  			elem.cpp

 ***************************************************************************/

#include <iostream.h>
#include <string.h>
#include "elem.h"

elem::elem ()
{
  pnext = 0;
  cout << "konstruktor klasy elem" << endl;
}

elem::~elem ()
{
  if (pnext)
    delete pnext;
  cout << "destruktor klasy elem" << endl;
}

elem *
elem::insert_after (elem * ael)
{
  if (!pnext)
    return (pnext = ael);
  if (!ael)
    return 0;

  ael->set_next (pnext);
  return pnext = ael;
}

elem *
elem::set_next (elem * ael)
{
  if (!ael)
    return 0;
  return pnext = ael;
}


elem_str::elem_str (char *val)
{
  cout << "konstruktor klasy elem_str" << endl;
  if (val)
    {
      my_val = new char[strlen (val) + 1];
      strcpy (my_val, val);
    }
  else
    my_val = 0;
}

elem_str::~elem_str ()
{
  if (my_val)
    cout << "destruktor elem_str, przechowywana wartosc: " << my_val <<
endl;
  else
    cout << "destruktor elem_str - brak wartości" << endl;
  if (my_val)
    delete[]my_val;
}