From: Shriramana Sharma <samjnaa@gmail.com>
To: linux-c-programming@vger.kernel.org
Subject: Double values - what precision do I use for fprintf?
Date: Thu, 12 Jan 2006 18:00:19 +0530 [thread overview]
Message-ID: <200601121800.19678.samjnaa@gmail.com> (raw)
Please observe the following printf output of eighteen double variables:
First I tried using "%20.15f" as the format string:
268.229220252114942 1.018511211250181
66.833038547989787 12.450505533056681
20.512170161382819 0.334923179252419
259.358845955701327 1.571934717666495
201.111247720862963 0.139476171219810
270.658029698352152 -0.612280599380678
105.175902698424665 -0.076345132989225
343.809699615507384 -0.219206370786681
Then I used "%30.25f":
268.2297152740335377529845573 1.0185111507334088098986058
66.8390907719954157073516399 12.4504269834231084956854829
20.5123328842112115921736404 0.3349264346316725426966343
259.3596100022817267927166540 1.5719383906021777708161835
201.1113154335791932680876926 0.1394751696317115263745734
270.6577319741974747557833325 -0.6122834912138217511312632
105.1758654981413201312534511 -0.0763454696609412730712307
343.8095929658045974974811543 -0.2192182978826520134418843
Ignoring the small differences in the two sets of data (longitude and speed of
eight celestial bodies computer at two different instants) I wonder - if I
keep increasing the number of decimal places where will it end?
--
Shriramana Sharma http://samvit.org
Running SUSE Linux 10.0 with KDE 3.5
--
Penguin #395953 resides at http://samvit.org
subsisting on SUSE Linux 10.0 with KDE 3.5
next reply other threads:[~2006-01-12 12:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-01-12 12:30 Shriramana Sharma [this message]
2006-01-12 14:17 ` Double values - what precision do I use for fprintf? Patrick Leslie Polzer
2006-01-12 18:51 ` Steve Graegert
2006-01-12 21:22 ` Nate Jenkins
2006-01-12 22:00 ` Mihai Dontu
2006-01-13 23:47 ` Glynn Clements
2006-01-14 0:35 ` Nate Jenkins
2006-01-17 5:37 ` Glynn Clements
2006-01-12 21:57 ` Scott
2006-01-12 22:06 ` Scott
2006-01-13 5:25 ` Steve Graegert
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=200601121800.19678.samjnaa@gmail.com \
--to=samjnaa@gmail.com \
--cc=linux-c-programming@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).