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Article #15435Re: conjugaison et autres exos sur les chaines [Was : Un système de conj...]
From: Emmanuel Delahaye
Date: Mon, 19 Sep 2005 19:54
Date: Mon, 19 Sep 2005 19:54
43 lines
2749 bytes
2749 bytes
harpo wrote on 19/09/05 : > Donc, si p contient une valeur quelconque d�finie comme 'NULL', les tests : > ( p != 0 ) et ( p != NULL ) seraient �quivalent ? Oui, si p est un pointeur. Nota : vu du C, les seules valeurs admises pour NULL sont 0 et (void*) 0. La repr�sentation interne d�pend de l'impl�mentation, mais ce n'est pas le probl�me. C'est pourquoi : char *p; /* conformes (NULL) : */ p = 0; p = (void*)0; p = NULL; p = 123-123; /* non definis par la norme (le resultat depend de l'implementation) */ memset (p, sizeof p, 0); p = (char*) 1, p--; int x = 0; p = (char *) x; etc. -- Emmanuel The C-FAQ: http://www.eskimo.com/~scs/C-faq/faq.html The C-library: http://www.dinkumware.com/refxc.html "Mal nommer les choses c'est ajouter du malheur au monde." -- Albert Camus.
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X-Google-Thread: f9822,b21b26167a936e28 X-Google-Attributes: gidf9822,public X-Google-Language: FRENCH,ASCII Path: arc1-ca.pugleaf.net!g2news1.google.com!news2.google.com!news1.google.com!proxad.net!infeed-1.proxad.net!news12-e.free.fr!not-for-mail Subject: Re: conjugaison et autres exos sur les chaines [Was : Un système de conj...] From: "Emmanuel Delahaye" <emdel@YOURBRAnoos.fr> References: <1126342327.583568.21420@g43g2000cwa.googlegroups.com> <dge4b6$fqa$1@reader1.imaginet.fr> <mn.837a7d59123d924a.15512@YOURBRAnoos.fr> <432adddf$0$17220$8fcfb975@news.wanadoo.fr> <mn.84407d597cfa6e6e.15512@YOURBRAnoos.fr> <432b2a92$0$7861$8fcfb975@news.wanadoo.fr> <432c19e0$0$1710$8fcfb975@news.wanadoo.fr> <432cad90$0$27422$8fcfb975@news.wanadoo.fr> <432d1b7c$0$1743$8fcfb975@news.wanadoo.fr> <432d3117$0$1742$8fcfb975@news.wanadoo.fr> <mn.93877d590449a7bc.15512@YOURBRAnoos.fr> <432d7667$0$17248$8fcfb975@news.wanadoo.fr> <mn.94047d599f0cc076.15512@YOURBRAnoos.fr> <432da70c$0$1735$8fcfb975@news.wanadoo.fr> <432dd52f$0$622$626a14ce@news.free.fr> <mn.95687d59be8517f2.15512@YOURBRAnoos.fr> <432df189$0$2933$626a14ce@news.free.fr> <432e973a$0$1013$8fcfb975@news.wanadoo.fr> <432ec68e$0$3758$626a14ce@news.free.fr> <432eff47$0$27415$8fcfb975@news.wanadoo.fr> <mn.9ce67d59d5b1a352.15512@YOURBRAnoos.fr> <432f1360$0$1010$8fcfb975@news.wanadoo.fr> Newsgroups: fr.comp.lang.c Message-ID: <mn.9d227d5938cd81c4.15512@YOURBRAnoos.fr> X-Newsreader: MesNews/1.04.00.00-fr Date: Mon, 19 Sep 2005 21:54:33 +0200 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-15"; format=flowed Content-Transfer-Encoding: 8bit Lines: 45 Organization: Guest of ProXad - France NNTP-Posting-Date: 19 Sep 2005 21:54:37 MEST NNTP-Posting-Host: 81.65.109.78 X-Trace: 1127159677 news12-e.free.fr 9448 81.65.109.78:11454 X-Complaints-To: abuse@proxad.net