Path: utzoo!attcan!uunet!mcvax!hp4nl!botter!star.cs.vu.nl!ceriel
From: ceriel@cs.vu.nl (Ceriel Jacobs)
Newsgroups: comp.os.minix
Subject: Re: minix/ST cc peculiarity
Message-ID: <1634@ceriel.cs.vu.nl>
Date: 8 Nov 88 07:04:18 GMT
References: <257@cstw01.UUCP>
Reply-To: ceriel@cs.vu.nl (Ceriel Jacobs)
Organization: VU Informatica, Amsterdam
Lines: 37

To: meulenbr@cst.UUCP
From: Ceriel Jacobs <ceriel@cs.vu.nl>
Subject: Re: minix/ST cc peculiarity
Newsgroups: comp.os.minix
In-Reply-To: <257@cstw01.UUCP>
Organization: VU Informatica, Amsterdam
Cc: 
Bcc: 

In article <257@cstw01.UUCP> you write:
>Hi!
>
>I noticed the following problem in the minix st C compiler.
>Given the following program:
>#define SOMETHING -32768
>#include <stdio.h>
>
>main()
>{
>	printf("%d\n", SOMETHING);
>}
>
>The result is, that -1 is printed.
>Thing work well for -32767.
>Also defining SOMETHING as (int)(-32768L) works fine.
>

This is not a bug. The C reference manual(2.4.1) states:
	A decimal constant whose value exceeds the largest signed machine
	integer is taken to be long;
Notice that -32768 in this context is not a constant, but a constant
expression. The constant is 32768, which exceeds the largest signed machine
integer. So, the constant expression -32768 is a long, and should thus
be printed with %ld (or, in PC Minix 1.1, with %D).

--
Ceriel Jacobs, Vrije Universiteit Amsterdam	<ceriel@cs.vu.nl>