From: Nate Eldredge <neldredge AT hmc DOT edu>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: indexOf function
Date: 22 Nov 1999 14:08:17 -0800
Organization: InterWorld Communications
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"Morpheus" <hall AT cs DOT unt DOT edu> writes:

> Could I use some pointer arithmetic to find the index once I use strstr? If
> so, I'm not exactly sure how I'd do it. Could you demonstrate?

Sure.  Untested but probably correct code follows:

ssize_t indexOf(const char *haystack, const char *needle)
{
  const char *p;
  p = strstr(haystack, needle);
  if (p)
    return p - haystack;
  else
    return -1;
}

HTH

-- 

Nate Eldredge
neldredge AT hmc DOT edu