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From: norm AT dad DOT org
Message-Id: <200201150045.QAA04280@dad.dad.org>
cc: cygwin AT cygwin DOT com, "Steven C. Bankes" <steve AT virgil DOT evolvinglogic DOT com>,
   "Steven C. Bankes" <stevebankes AT yahoo DOT com>,
   "Nathaniel Anagnostou" <nateana AT pacbell DOT net>
Subject: Re: Need help Accessing a NAN 
In-reply-to: Your message of "Mon, 14 Jan 2002 10:14:14 PST."
             <200201141814 DOT KAA21325 AT dad DOT dad DOT org> 
Reply-To: norm AT dad DOT org
cc: norm AT dad DOT org
Date: Mon, 14 Jan 2002 16:45:36 -0800

norm AT dad DOT dad DOT org writes:
>Under Linux I do:
>
>include <math.h>
>...
>reciprocal=NAN;
>
>
>When I try to compile this under cygwin, gcc complains that NAN is undefined.
>
>Under cygwin, "man nan", tells me about a function named nan(), also using math.h.
>When I try to use it, gcc complains about an implicit declaration of nan().


I solved this problem myself. Albeit very inelegantly

inline double nan()
{
  # ifdef NAN
     return NAN;
  #else
    double x=0.0;
    return 0/x;
  #endif
}


    Norman Shapiro
    798 Barron Avenue
    Palo Alto CA 94306-3109
    (650) 565-8215
    norm AT dad DOT org

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