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From: kimcm@olamb.UUCP
Newsgroups: comp.lang.c
Subject: Re: C questions
Message-ID: <197@olamb.UUCP>
Date: Thu, 12-Feb-87 07:00:56 EST
Article-I.D.: olamb.197
Posted: Thu Feb 12 07:00:56 1987
Date-Received: Thu, 19-Feb-87 06:27:13 EST
References: <2335@brl-adm.ARPA> <194@olamb.UUCP> <954@dg_rtp.UUCP>
Organization: AmbraSoft A/S (Denmark)
Lines: 27

In article <954@dg_rtp.UUCP>, meissner@dg_rtp.UUCP (Michael Meissner) writes:
] In article <194@olamb.UUCP> kimcm@olamb.UUCP (Kim Chr. Madsen) writes:
] ] 		[Some code of mine...]
] 
] Let's indead consider this example.  This is wrong, wrong, wrong (even
] though it may happen to work on your system).  The second argument to
] read is a char *, not a structure pointer.  To pass lint (and to have
] it work on word-based machines), it should read:
] 
] 	/* ... */
] 
] 	while (read(fd, (char *) &person,sizeof(person)) == sizeof(person)) {
] 		/* ...do something to person structure... */
] 	}




Well, I made a mistake, I wrote the code on the spot and forgot to cast the
struct pointer to a char pointer. Yes I know they have different types, but
that doesn't make the example (of proving sizeof as essential knowledge to
a C programmer) invalid.

	

					Kindly Regards
					Kim Chr. Madsen