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From: pdsmith@bbn.com (Peter D. Smith)
Newsgroups: comp.lang.c
Subject: Re: strcmp
Message-ID: <64771@bbn.BBN.COM>
Date: 19 Jun 91 22:42:59 GMT
References: <2695@m1.cs.man.ac.uk> <1991Jun18.074029.12226@panix.uucp>
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Reply-To: pdsmith@spca.bbn.com (Peter D. Smith)
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In article <1991Jun18.074029.12226@panix.uucp> yanek@panix.uucp (Yanek Martinson) writes:
>For intcmp(a,b) why not just use a-b ? That will tell you if they are equal
>and if not, which is greater.
>
>For strcmp(s,t): while(*s++==*t++&&*s&&*t); return *s-*t;

a-b will NOT tell you which is larger.  Instead it will overflow and
either return the wrong answer or call the fatal-error trap and
abruptly end the experiment.

					Peter D. Smith