From: "Carlo E. Prelz" <fluido@...>
Date: 2012-12-24T05:39:42+09:00
Subject: Re: simple division: -9 / 5 = -2 what?

	Subject: Re: simple division: -9 / 5 = -2 what?
	Date: Mon 24 Dec 12 03:32:57AM +0900

Quoting Matma Rex (matma.rex@gmail.com):

> On Sun, 23 Dec 2012 19:24:00 +0100, Derrick B. <lists@ruby-forum.com> wrote:
> 
> >But I want a "correct" answer, which is not -2.  Hence:
> 
> Why? -9 / 5 = -2 with a remainder of 1, because -2 * 5 + 1 = -9.

Yes, but... Why is it that this C code:

#include "stdio.h"

void main(void)
{
  int i1=-9,i2=5;
  
  printf("%d/%d=%d\n",i1,i2,i1/i2);
}

produces this output:

-9/5=-1

?

I don't know which one is right, but I thought both C and Ruby were
doing integer maths in the same way...

Carlo

-- 
  *         Se la Strada e la sua Virtu' non fossero state messe da parte,
* K * Carlo E. Prelz - fluido@fluido.as             che bisogno ci sarebbe
  *               di parlare tanto di amore e di rettitudine? (Chuang-Tzu)