Fun With Floats in Quintus

Article View: comp.lang.prolog

Article #1073

#1073

From: Eric Iverson
Date: Mon, 13 Aug 1990 23:44

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How oh how does one represent the numbers 8.1 and 5.4 in Quintus
Prolog?  I have tried everything I can think of without any luck.
Below are a few of my attempts:
----------------------------------------------------------------------------
Quintus Prolog Release 2.5.1 (Sun-4, SunOS 4.1)

| ?- X is 8.1.

X = 8.09999

| ?- X is 5.4.

X = 5.39999 

| ?- number_chars(8.1,X),number_chars(Y,X).

X = [56,46,48,57,57,57,57],
Y = 8.09998 

| ?- number_chars(5.4,X),number_chars(Y,X).

X = [53,46,51,57,57,57,57],
Y = 5.39999 

| ?- X is 8.1+0.00001.

X = 8.09999 

| ?- X is 8.1+0.00002.

X = 8.10001 

| ?- X is 8.09999+0.00001.

X = 8.09998

| ?- X is 8.09999+0.00002.

X = 8.09999 

| ?- X is 8.09999+0.00003.

X = 8.09999 

| ?- X is 8.09999+0.00004.

X = 8.10001 

--
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Eric Iverson				Internet: eiverson@nmsu.edu
Computing Research Lab
Box 30001/3CRL				Life is something to do when
New Mexico State University		you can't get to sleep.
Las Cruces, NM 88003-0001			-Fran Lebowitz
(505) 646-5711

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From: eiverson@nmsu.edu (Eric Iverson)
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Subject: Fun With Floats in Quintus
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Date: 13 Aug 90 23:44:24 GMT
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