Re: 0.3-0.2=0.999999999998?

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#16382

From: Harry Rowe
Date: Fri, 05 Mar 1999 00:00

33 lines
1755 bytes

>Would you care to explain how fully compliant IEEE 754 would handle
>that differently?
/*
Roedy,

Oops. Thats why you asked <G>. I find
you cannot  define 0.1 with finite precision
in base 2 with n digits of precision.

However, I was thinking that if Java allowed
the 10 byte double extended, gave the
programmer access to different IEEE
rounding modes, and did some sub-expression
handling differently, then perhaps the program
below would evaluate to true?

Frankly, I find these axioms a little scarry.

It is an interesting and very complex subject.
*/

public class TestReal {
   public static void main(String args[]) {
      double x = 0.3;
      double y = 0.2;
      double z = 0.1;
      if (x - y == z)
          System.out.println("true");
      else
        System.out.println("false");

      }
   }

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From: "Harry Rowe" <hrowe@erinet.com>
Subject: Re: 0.3-0.2=0.999999999998?
Date: 1999/03/05
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