Re: Record

From: Bruce Roberts (ber_at_bounceitattcanada.xnet)
Date: 10/28/04 

Date: Thu, 28 Oct 2004 12:37:07 -0400

"Profetas" <xuxu_18@yahoo.com> wrote in message
news:bfdf05c346d339ced65cc7cf8197dc02@localhost.talkaboutprogramming.com...
> Hi,
>
> How do I access the head and last from this structure?
>
> type
> LineElem = ^LineElemDesc;
> LineList = record head, last: LineElem
> END;
>
>
> LineElemDesc = record
> Line: INTEGER;
> next: LineElem;
> END;
>
> var
> list : LineElem;
>
> suppose I wante to create a list

    var list : LineList;

> new(list);

> list^.next :=NIL;
> list^.line := line;
>
> I forgot how I access the head and last?

    list.Head := nil;
    list.Last := nil;

To add a record

   var elem : LineElem;

    new (elem);
    if list.Last <> nil
    then list.Last.Next := elem
    else list.Head := elem;
    list.Last := elem;
    list.Last.Next := nil;

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