From: Nate Eldredge <neldredge AT hmc DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem with strcat
Date: Sun, 19 Sep 1999 13:22:04 -0700
Organization: Harvey Mudd College
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To: djgpp AT delorie DOT com
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Kilgore Trout wrote:
> 
> Hello,  I am working on a school assignment and have run into a small
> problem with djgpp.  The purpose of the program is to take a number less
> than 80 typed out in words (such as 'twenty two'), convert it to and
> integer, add seventeen, and convert the integer back into words.  I run into
> a problem if I run the program and input a number greater than or equal to
> 'seventy four'.  I have tried compiling with two other compilers (lcc and
> cc) and the program has worked fine.  I think that the problem may be in the
> line
>   strcat(output_string, integer_to_words(number));
> Any help is greatly appreciated.

The string returned from `integer_to_words' is a constant (since it came
from a literal).  You assign it to `output_string' and then try to
modify it, which is a no-no.  Not only is it constant, but there is no
space for additional characters, so you overwrite something else.

You'll have to create some writable space for it (an array or use
`malloc').
-- 

Nate Eldredge
neldredge AT hmc DOT edu