This is an unnecessary obfuscation for no apparent reason. The statement albeit short is very obtuse. JavaFan has given a great explanation of how this obscure thing works.
A Perl implementation of a more traditional and MUCH faster approach is below. Perl allows very obscure looking code to be written, but why do it?
#!/usr/bin/perl -w
use strict;
foreach (1..15)
{
print fibonacci($_), " ";
}
# prints: 1 1 2 3 5 8 13 21 34 55 89 144 233 377 610
sub fibonacci
{
my $number = shift;
my $cur_num = 1;
my $prev_num = 1;
my $sum;
return 1 if ($number == 1 || $number == 2);
# to get Op's output, supress the above by this:
# return "" if ($number == 1 || $number == 2);
# or of course just start the sequence at a different number
$number -= 2;
while ($number--)
{
$sum = $cur_num + $prev_num;
$prev_num = $cur_num;
$cur_num = $sum;
}
return $sum;
}
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|