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From: Simon Wright <simon@pushface.org>
Newsgroups: comp.lang.ada
Subject: Re: chained List manipulation without recusrsion : lost the begining
 of my List!
Date: 15 May 2003 06:58:01 +0100
Organization: Pushface
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Date: 2003-05-15T06:58:01+01:00
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"Zeg" <zeg.nospam@9online.fr> writes:

> procedure Insert_iteratif(E : in Element; L : in out Liste) is
> Aux : Liste := L;
> Z : Liste := null;

You don't need to initialize access variables, they are automatically
set to null for you

> begin
>       if (Aux = null) then
>          Aux := new Maillon'(E,null);

L was empty, so what is it pointing to now? Should you have altered it?

>       else
>          while  (Aux /= null) loop
>               if (Aux.all.valeur > E) then
>                   L := new Maillon'(E,Aux);

What has happened to all the previous elements in the list? (that L
used to be pointing to)

>                   exit;
>             elsif (Aux.all.suivant = null) then
>                   L:= new Maillon'(E,null);

What has happened to all the previous elements in the list?

>                   exit;
>             end if;
>             z := Aux ;

What is Z for? You don't read it anywhere

>             Aux := Aux.all.suivant;
>          end loop;
>      end if;
> 
> end Insert_iteratif;

It might help you to draw a picture of Maillons linked into a Liste,
and how you want a new Maillon to be linked in.