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From: nather@utastro.UUCP (Ed Nather)
Newsgroups: net.lang.c,net.micro,net.micro.pc
Subject: weird C behavior
Message-ID: <557@utastro.UUCP>
Date: Fri, 21-Mar-86 13:29:55 EST
Article-I.D.: utastro.557
Posted: Fri Mar 21 13:29:55 1986
Date-Received: Mon, 31-Mar-86 06:07:04 EST
Organization: U. Texas, Astronomy, Austin, TX
Lines: 35
Keywords: strange, opaque, odd
Xref: linus net.lang.c:7644 net.micro:12873 net.micro.pc:7244

Here is a short C program which gives correct output according to K & R.
While I can't argue it's wrong, it is not transparently right, either.
The following was extracted directly from the display screen of my
IBM PC.  Try it on *your* 16-bit computer.  Then explain it to a friend.
-----------------------------------------------------------------------
C% print weird.c

/* weird.c - demonstrate weird C behavior */
/* Reference: Kernighan and Ritchie pp. 40-41 */

#include <stdio.h>

#define BIG 36864

main()
{
int i;

i = BIG;
if(i == BIG)
    printf("Equality found: i = %d, BIG = %d\n", i, BIG);
else
    printf("Equality NOT found: i = %d, BIG = %d\n", i, BIG);
}

C% weird

Equality NOT found: i = -28672, BIG = -28672

-----------------------------------------------------------------------
-- 
Ed Nather
Astronomy Dept, U of Texas @ Austin
{allegra,ihnp4}!{noao,ut-sally}!utastro!nather
nather@astro.UTEXAS.EDU