your module is not installed on you machine.
the way you have created is meant for the CPAN

create a file say Testingmodule.pm (note the extention .pm)
and then in the same directory
create you program and write use Testingmodule
OR
you can upload your module to CPAN and then install it on your machine perl -MCPAN -e 'install youmodulename'and then use it in your program
because by installing it, itll come to @INC.
but this is not a good idea since your module is not be usefull to anyone
use CPAN to share usefull module
OR
install it by source i.e
perl Makefile.pl
make
make install

I Hope Everything is clear now

In reply to Re: dumb question about perl module creation and use by ansh batra
in thread dumb question about perl module creation and use by desertrat

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.