Xref: utzoo comp.std.c:2566 comp.lang.c:26684
Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!think!mintaka!ogicse!intelhf!dios!clubmed.hf.intel.com!martin
From: martin@clubmed.hf.intel.com.ogi.edu
Newsgroups: comp.std.c,comp.lang.c
Subject: ANSI scanf dropping sign bit?
Keywords: ANSI
Message-ID: <491@dios.hf.intel.com>
Date: 7 Mar 90 16:02:12 GMT
Sender: martin@dios.hf.intel.com
Reply-To: martin@clubmed.hf.intel.com (Martin Wilde)
Organization: OMSO Software Engineering - Intel Corp. - Hillsboro Or.
Lines: 34

Why does the following program when linked to an ANSI standard library
produce the following:

input: 90000000

output: 10000000

input: 80000000

output: 00000000

#include <stdio.h>

int main()
{
	unsigned int	input;

	scanf("%x", &input);

	printf("%x\n", input);
}

It appears that sign bit is being dropped.  I have run this program on
Sys V.3.2 and it retains the sign bit, but this is not ANSI compliant.

Any hints...
thanks

                          
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