From: "A. Sinan Unur" <sinan DOT unur AT cornell DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Bug in DJGPP?
Date: Sun, 05 Oct 1997 10:18:03 -0400
Organization: Cornell University http://www.cornell.edu
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Liche wrote:
> 
> I use DJGPP v2.01, with RHIDE 1.4.
> When I compile this code:
> #include <iostream.h>
> 
> short counter()
> {
>     auto short count;
>     count ++;
>     cout << count << " ";
>     return 0;
> }
> 
> int main()
> {
>     short i;
>     for (i = 0; i < 10; i ++)
>        counter();
>     return 0;
> }
> 
> This is displayed:
> 1 2 3 4 5 6 7 8 9 10
> 
> This happens everytime.  Shouldn't the values returned be random?
> If I change auto short count; with auto short count = 20; , however,
> this is displayed:
> 21 22 23 24 25 26 27 28 29 30
> 
> Is this a problem with me, DJGPP, or RHIDE?

you.

the first one is not very surprising.
the values are not supposed to be random; they are just undefined; i.e.
the memory location is not initialized when the variable is created.

i don't understand the second case, are you saying that djgpp fails to
initialize count with 20 in the following function:

> short counter()
> {
>     auto short count = 20;
>     count ++;
>     cout << count << " ";
>     return 0;
> }

if you made this change, and you did not get 21 21 21 21 21 21 ... i
can't be 100% certain (i don't feel like booting back to dos right now)
but i seriously doubt you second claim.
-- 
----------------------------------------------------------------------
A. Sinan Unur
Department of Policy Analysis and Management, College of Human Ecology,
Cornell University, Ithaca, NY 14853, USA

mailto:sinan DOT unur AT cornell DOT edu
http://www.people.cornell.edu/pages/asu1/