From: Maurice Lombardi <Maurice DOT Lombardi AT ujf-grenoble DOT fr>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Another silly question about the double 0.1  ...
Date: Wed, 17 Jun 1998 20:13:21 -0700
Organization: Universite Joseph Fourier - Grenoble 1, Grenoble, France
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Roberto Sassi a écrit:

> #include <stdio.h>
> 
> int main(void) {
> 
>  double r=0.1;
>  double inc=0.05;
> 
>  for(;r<=0.25;r+=inc)
>     printf("%6.5f\n",r);
> 
>  }
> 

better write:
   for (;r<=0.25001;r+=inc) 
it is fool to rely on exact roundings to end a loop. 

-- 
       Maurice Lombardi
Laboratoire de  Spectrometrie Physique,
Universite Joseph Fourier de Grenoble, BP87
38402 Saint Martin d'Heres Cedex     FRANCE
Tel: 33 (0)4 76 51 47 51
Fax: 33 (0)4 76 51 45 44
mailto:Maurice DOT Lombardi AT ujf-grenoble DOT fr