Beefy Boxes and Bandwidth Generously Provided by pair Networks
We don't bite newbies here... much
 
PerlMonks  

Comment on

( #3333=superdoc: print w/ replies, xml ) Need Help??
sub isNumber { local( $_ )= @_; my( $ok, $val, $base ); if( s/h$//i && s/^/0x/ || m/^0x/ ) { $ok= m/^0x[\da-f]+$/i; $val= hex($_); $base= 16; } elsif( s/o$//i ) { $ok= m/^[0-7]+$/; $val= oct($_); $base= 8; } else { my $warn; local( $SIG{__WARN__} )= sub { $warn= $_[0]; }; local( $^W )= 1; $val= 0 + $_; $ok= ! $warn; $base= 10; } $_[1]= $val; $_[2]= $base; return $ok; } my $num= <STDIN>; my $val; if( isNumber( $num, $val, $base ) ) { print "Your number's value is $val in base $base.\n"; } else { print "Your number is invalid but might be close to $val in base $ +base.\n"; }

Note that I didn't treat a leading zero as octal and I'm a bit inconsistant with how much whitespace I'll ignore.

Updated: To return the base.

        - tye (but my friends call me "Tye")

In reply to (tye)Re: Extract numbers in multiple bases by tye
in thread Extract numbers in multiple bases by jcwren

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!
  • 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, 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, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • Outside of code tags, you may need to use entities for some characters:
            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.
  • Log In?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others drinking their drinks and smoking their pipes about the Monastery: (4)
    As of 2014-09-21 01:49 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      How do you remember the number of days in each month?











      Results (165 votes), past polls