Path: utzoo!attcan!uunet!husc6!panda!teddy!set
From: set@teddy.UUCP (Sean E. Trowbridge)
Newsgroups: comp.sys.mac.programmer
Subject: Re: Float to integer conversion problem in LSC 3.0?
Keywords: Lightspeed, LSC, conversion
Message-ID: <4933@teddy.UUCP>
Date: 8 Aug 88 15:58:46 GMT
References: <5813@batcomputer.tn.cornell.edu>
Reply-To: set@teddy.UUCP (Sean E. Trowbridge)
Organization: GenRad, Inc., Concord, Mass.
Lines: 19

In article <5813@batcomputer.tn.cornell.edu> eacj@tcgould.tn.cornell.edu (Julian Vrieslander) writes:
>
>        double d;
>        long m,n;
>	
>        m = 126.0;          /* m becomes 126 */	
>        d = 12.6 * 10.0;    /* d becomes 126 */
>        n = d;              /* n becomes 125 !! */
>		
>I cannot understand why n gets "rounded down" to 125.
>Julian Vrieslander     "Don't rush me... you'll get a rotten miracle."

Floating point calculations are not always exact, since numbers are
converted from decimal to binary and back.  Since converting from a
float to an int simply truncates the fractional part, I would imagine
that 12.6 * 10.0 gives you 125.9999999, and assigning that value to an
int (long) gives you 125.

Sean Trowbridge