From: wpp AT brinet DOT com
Newsgroups: comp.os.msdos.djgpp
Subject: Re: 2 quick questions
Date: Sat, 29 Aug 1998 01:22:41 GMT
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On Fri, 14 Aug 1998 18:18:41 -0800, Bjorn Hansen <viking AT xyz DOT net>
wrote:

>1]  what does the exit code tell you?
>
>2] why does the compiler have a warning message if you don't use a
>caste? when you do something like this
>
>int i;
>int *ip;
>ip=i;
>
>instead of this
>
>int i;
>int *ip;
>ip=(int *)i;
>
>
>Bjorn Hansen
>

RE 1]   the exit code from main is passed back to the OS. MS-DOS uses
this value to set the environment variable errlevel.  You can use that
value in a batch file to control batch file processing.


RE 2] The type cast is used to keep programmers from doing dumb
things.  In effect it tells the compiler  "Hey, I know this isn't a
normal assignment, but do it anyways. "