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<H1><font COLOR=#1809BB><A NAME="SECTION00710000000000000000">
Pointeur invalide</A>
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<A NAME="3400"> </A>
<A NAME="pointer-null"> </A>Quand on programme des listes cha頽閑s, on a besoin de disposer d'une valeur
de pointeur invalide pour indiquer la fin de la liste.
Dans le fichier d'include <code>stddef.h</code> se trouve la d閒inition d'une telle
valeur qui porte le nom de <code>NULL</code>.
Un certain nombre de fonctions de la biblioth鑡ue standard qui doivent rendre
un pointeur, utilisent la valeur <code>NULL</code> comme indicateur d'erreur.
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<BR><I>30/9/1997</I>
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