From:	mike4148 AT aol DOT com (Mike4148)
Newsgroups:	comp.os.msdos.djgpp
Subject:	Arrays and Alignment
Date:	24 Aug 1997 20:12:28 GMT
Lines:	28
Message-ID:	<19970824201201.QAA12844@ladder01.news.aol.com>
NNTP-Posting-Host:	ladder01.news.aol.com
Organization:	AOL http://www.aol.com
To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp

I've had a recurring problem with just about every type of program
imaginable (from simple test progs, to games with Allegro, to file
manipulation utilites). Sometimes, when I create an array and index the
last element, I get a SIGSEGV and the program terminates. Here is a little
bit of pointless example code to illustrate the situation :

int lots_of_ints[4];
lots_of_ints[4] = 1;

Then the error occurs. It happens about 50% of the time, and with every
type of variable imaginable. I was thinking it might be some sort of
alignment thing (a la arrays in which the final element is accessed need
to be of multiples of 2, 8, 16, etc.). Any suggestions?

And then my second array-related question. I've never initialized arrays
the conventional way. From BTC++ 3.0 to DJGPP I've always been used to
initializing them in for loops or just not initializing them at all.
Anyway, when I tried to initialize an array the normal way, it would start
at element 1 and end at the last element. Here is an example :

int lots_of_other_ints[4] = {0, 1, 2, 3, 4};

This snippet of code would get an error such as "array subscript out of
bounds" (I'm not sure exactly what it was, this is the jist of it). I'm
sure that no other part of my code is the problem. Any suggestions? Thanks
in advance.

mike4148 AT aol DOT com

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