Mail Archives: djgpp/1995/11/29/18:31:43

Xref: comp.lang.c++:59180 comp.os.msdos.djgpp:3498
From: Quantum Porcupine <jshagam AT nmsu DOT edu>
Newsgroups: comp.os.msdos.djgpp,comp.lang.c++
Subject: Re: Declaring arrays inside generic function
Date: Tue, 28 Nov 1995 21:04:09 -0700
Organization: New Mexico State University
Lines: 34
References: <Pine DOT A32 DOT 3 DOT 91 DOT 951127202934 DOT 29743A-100000 AT srv1 DOT freenet DOT calgary DOT ab DOT ca>
To: djgpp AT sun DOT soe DOT clarkson DOT edu
Dj-Gateway: from newsgroup comp.os.msdos.djgpp

On Mon, 27 Nov 1995, Michael E. Wesolowski wrote:

> I don't know if this is a problem with gcc, the DOS port of gcc, or 
> something (i.e., not a bug) in the implementation that I don't know 
> about. I'm using the DOS port of gcc (djgpp), v1.12m4. This is equivalent 
> ot gcc 2.6.3, if I remember correctly.
> I have a generic function which has as one of its input parameters an int 
> which identifies an array size. Within the function, I attempt to declare 
> an array of int's:
> int item_count [array_size];
> where array_size is the input parameter. When I look at the array in the 
> debugger (gdb) however, what i see is an array of int pointers (I think) 
> - something like int (*) [60000] (the 60000 is approximate). If I 
> explicitly declare the array as, for example, item_count [10], I get the 
> expected array of 10, uninitialized ints. SO, what's the problem?
> If it's something in the ANSI standard, I'd appreciate the paragraph 
> reference as well as a simple description of what's going on. Thanks.
That's probably due to the old 64k segment limit imposed by DOS... it's 
probably just splitting it across many segments like any coder who's 
worked in realmode (yeah, I know, this is pmode, weird huh?) has done 
many times...

   / Joshua Shagam                    /    (Quantum Porcupine / Versatile) /
  / mailto:JShagam AT nmsu DOT edu          / /
 / phone://1.505.645.3856/~joshua   /  for the Quantum Porcupine Archive /
 Stop the execution of King Louis XIV!  If you agr-- oops, too late! :)

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