int BinTree::HasLeftTree()
{
  if (Cursor == NULL)
    return False;
  else if ((Cursor -> Left) == NULL))
    return False;
  else
   return True;
}

void BinTree::GoLeft()
{
  if (Cursor != NULL)
    Cursor = Cursor -> Left;
}

void BinTree::DoInOrder(NodePtr Next, FcnType Visit)
{
  if (Next != NULL)
  {
    DoInOrder(Next -> Left, Visit);
    Visit(Next -> Info);
    DoInOrder(Next -> Right, Visit);
  }
}

void BinTree::InOrder(FcnType Visit)
{
  DoInOrder(Root, Visit);
}

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