Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.earthlink.com!news.earthlink.com.POSTED!not-for-mail
NNTP-Posting-Date: Wed, 12 Oct 2011 20:12:04 -0500
Message-ID: <4E963AE4.6090@mindspring.com>
Date: Wed, 12 Oct 2011 21:12:04 -0400
From: pete <pfiland@mindspring.com>
Reply-To: pfiland@mindspring.com
Organization: PF
X-Mailer: Mozilla 3.04Gold (WinNT; I)
MIME-Version: 1.0
Newsgroups: comp.lang.c
Subject: Re: unsigned == signed ?
References: <j72687$bcn$1@speranza.aioe.org> <j72979$j2n$1@speranza.aioe.org> <lnlisrtdp6.fsf@nuthaus.mib.org> <j74dr1$kus$1@speranza.aioe.org>
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Lines: 41
X-Usenet-Provider: http://www.giganews.com
NNTP-Posting-Host: 4.154.221.123
X-Trace: sv3-M3BCnfv85aboCJK6GXwRcBER+cyBekR9P7D2u7qKHBRiW0eDM+zIiXgYf0Nu+U+2FLs7bYH1wWCTgSp!rAVywZPi6x5GmZH9+RH9905rVC8ECu32AKxLOTUEJUdvECA+KKLtzUKYycraHw8CZr0wiQrirSke!uQ9dd98oHos=
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.40
X-Original-Bytes: 1840
Xref: x330-a1.tempe.blueboxinc.net comp.lang.c:11603

Quentin Pope wrote:
 
> true, my mistake.
> however the values are converted first. to prove it, try this
> long x = -1; /* (32 bit, signed) */
> unit y = -1; /* (16 bit, unsigned) */
> if (x == y)  printf("EQUAL");
> will print EQUAL !

Here's what I get for output:

/* BEGIN output from new.c */
    NOT!!!
/* END output from new.c */

And here's the program:

/* BEGIN new.c */

#include <stdio.h>

int 
main(void)
{
    long x = -1; 
    unsigned char y = -1; 

    puts("\n/* BEGIN output from new.c */");
    if (x == y) {
        puts("EQUAL");
    } else {
        puts("    NOT!!!");
    }
    puts("/* END output from new.c */");
    return 0;
}

/* END new.c */

-- 
pete