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From: cc100aa@prism.gatech.EDU (Ray Spalding)
Newsgroups: comp.lang.c
Subject: Re: binary to ascii
Keywords: binary, ascii, translation
Message-ID: <13680@hydra.gatech.EDU>
Date: 14 Sep 90 18:00:34 GMT
References: <371@bally.Bally.COM> <574@demott.COM>
Distribution: usa
Organization: Georgia Institute of Technology
Lines: 16

In article <574@demott.COM> kdq@demott.COM (Kevin D. Quitt) writes:
>In article <371@bally.Bally.COM> siva@bally.Bally.COM (Siva Chelliah) writes:
>>    i=(int ) c;
>>    i=i &  0x00FF;   /* this is necessary because when you read, sign is 
>>                        extended in c   */
>    Try "i = (unsigned int) c;" and you'll see it isn't necessary.  

This is incorrect (where c is a signed char).  When converting from a
signed integral type to a wider, unsigned one, sign extention IS
performed (in two's complement representations).  See K&R II section
A6.2, "Integral Conversions".
-- 
Ray Spalding, Technical Services, Office of Information Technology
Georgia Institute of Technology, Atlanta Georgia, 30332-0275
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