Intel chip, Linux (cobalt's hacked Redhat version), and Perl 5.6.1. POSIX 'floor' and 'ceiling' are mentioned in a couple of posts elsewhere on perlmonks. I'll look into those.

I think the suggestion that the 5 isn't really a '5' holds the most water. There are actually about 28 separate calculations being performed in that section and it is only in THAT PARTICULAR section that the round doesn't perform as expected.

Okay, I'm happy again. I just wanted an explanation for the (apparently) freaky behaviour.

-oakbox

In reply to Re: Re: Rounding With sprintf anomaly? by oakbox
in thread Rounding With sprintf anomaly? by oakbox

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.