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From: Cesar Rabak <crabak AT acm DOT org>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Trouble of using very large arrays
Date: Fri, 23 Apr 2004 07:00:45 -0300
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Message-ID: <4088E94D.8070508@acm.org>
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Brian Inglis escreveu:
 > On Thu, 22 Apr 2004 20:10:08 +0300 in comp.os.msdos.djgpp, "Alex
 > Vinokur" <alexvn AT big DOT foot DOT com> wrote:
 >
 >
 >> a = (unsigned int*)malloc (rows * columns * sizeof (unsigned int));
 >>
 >
 >
 > Nitpicks:
 >
 > -- avoid casting malloc results, as it is unnecessary to cast a void
 > pointer to any other type of pointer, but the explicit cast will mask
 >  not declaring malloc or including stdlib.h, and also mask assignment
 >  to a non-pointer type;

OK.

 >
 > -- avoid using types for sizes, in case someone later changes the
 > assigned pointer type; use object sizes instead;
 >
 > this is cleaner and more maintainable:
 >
 > a = malloc(rows * columns * sizeof *a);
 >
This is not a good advice: you're changing the allocation of an object 
of (rows x columns) ints to another of (rows x columns) pointers to int.