Message-ID: <19970606172546.00228@gil.physik.rwth-aachen.de>
Date: Fri, 6 Jun 1997 17:25:46 +0200
From: Christoph Kukulies <kuku AT gilberto DOT physik DOT rwth-aachen DOT de>
To: POULAIN Vincent <vpoulain AT club-internet DOT fr>
Cc: djgpp AT delorie DOT com
Subject: Re: how to convert float ->int?
References: <01bc6dff$6cbac9c0$10ee13cb AT bbs> <01bc6d5d$4afb4aa0$LocalHost AT vpoulain>
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In-Reply-To: <01bc6d5d$4afb4aa0$LocalHost@vpoulain>; from POULAIN Vincent on Sat, May 31, 1997 at 01:01:37AM +0000
Precedence: bulk

On Sat, May 31, 1997 at 01:01:37AM +0000, POULAIN Vincent wrote:
> 
> 
> abcEd <abced AT pinnacle DOT com DOT au> a écrit dans l'article
> <01bc6dff$6cbac9c0$10ee13cb AT bbs>...
> > whats the best way of converting from float to int?
> 
> I do use a simple way :
> 
> int a;
> float b=3.14;
> 
> a=b;

This is pretty sure an unportable way to do it. C is not FORTRAN.
Use casts a=(int)b; or use, what you need for your purpose:

#include <math.h>

main()
{
   int a;
   float b = 3.4,c = 3.5;

   a = rint(b);
   printf("rint(%f) = %d\n",b,a);
   a = rint(c);
   printf("rint(%f) = %d\n",c,a);
}                                                     

> 
> Fine, isn't it ?
> Only if you want the integer part of your float.
> If you want a rounded value, this will not work of course :-)
> 
> Vincent
> 

-- 
--
Chris Christoph P. U. Kukulies kuku AT gil DOT physik DOT rwth-aachen DOT de