Mail Archives: djgpp/2000/05/13/12:21:35

From: Nate Eldredge <neldredge AT hmc DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Please help...
Date: 13 May 2000 09:45:06 -0700
Organization: InterWorld Communications
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To: djgpp AT delorie DOT com
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"Justine Szczap" <jmszczap82 AT adelphia DOT net> writes:

> Can someone please try to tell me what I'm doing wrong here? This is all I
> have in 'main.c':
[snip okay-looking file]
> ... And this is all I have in 'display.h':
> /***** display.h *****/
> display_title()
> {
>  BITMAP *the_title;
>  create_bitmap(640, 480);

the_title = create_bitmap(640, 480);

>  clear(the_title);
> }
> ... What am I doing wrong? I have the 'allegro.cfg' file in the same
> directory. Everything seems to compile fine. The only problem is
> when I run the program it ends prematurely and gives a whole bunch
> of data and stack errors, etc. PLEASE HELP... Thanks...  - JS

You create a bitmap, but never assign it to the_title.  So your
carefully crafted bitmap goes off to the Great Void, and the_title
remains uninitialized, causing a crash when you try to clear it.

Note that in its present form your manipulations of the_title won't
have any effect, since you never display it to the screen... but you
probably knew that.


Nate Eldredge
neldredge AT hmc DOT edu

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