Bug in LSP arithmetic

Article View: comp.sys.mac

Article #42927

#42927

From: Rick Zaccone
Date: Tue, 23 May 1989 01:19

23 lines
1019 bytes

The following program produces incorrect results in LSP 2.01:

program test (input, output);
var
        a, out: real;
begin
        a := 16807.0;
        out := a * a;
        writeln(out : 10 : 0);
end.

The program prints 282475264 instead of the correct 282475249.  If I
type "a*a" in the observe window, I can see that a*a is being computed
correctly.  The error occurs when the assignment is made to out.  Can
anyone else reproduce this?  Am I missing something obvious?

I am running on a Mac Plus with Finder 6.1, and System 6.0.2.

Rick Zaccone
--
zaccone@bknlvms.bitnet
zaccone@rigel.bucknell.edu

Technical Details

Message-ID: <113@rigel.bucknell.edu>

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!psuvax1!hydra!rigel!zaccone

Show Full Headers

Complete Article Headers

Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!gatech!psuvax1!hydra!rigel!zaccone
From: zaccone@rigel.bucknell.edu (Rick Zaccone)
Newsgroups: comp.sys.mac,comp.sys.mac.programmer
Subject: Bug in LSP arithmetic
Message-ID: <113@rigel.bucknell.edu>
Date: 23 May 89 01:19:53 GMT
Reply-To: zaccone@sol.bucknell.edu ()
Organization: Bucknell University, Lewisburg, Pa.
Lines: 23