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    <p>It seems to me, you are mixing up two things here: Object-Oriented and Procedural Perl. Perl OO is kind of "different" (as in not mainstream but workable).</p> <p>Your TestBase.pm module seems to expect to be run as a Perl object (Perl oo-style), but your Perl script wants to access it as "normal" module. Perl doesn't work the way C++ does (as you realised) so you would have to construct your code differently. See Damian Conway's books for explanations (and smarter code than mine below).</p> <hr> <p><strong>Procedural:</strong></p> <pre><code>#! /usr/bin/perl #The module to inherit from package TestBase; use strict; use warnings; use Exporter (); our @ISA = qw (Exporter); our @EXPORT = qw (tbSub); #------------------------------- sub tbSub { my ($parm) = @_; print "\nTestBase: $parm\n"; } 1; </code></pre> <p>.</p> <pre><code>#! /usr/bin/perl #The descendent class use strict; use warnings; use TestBase; sub main; sub mySub; #------------------------------- #Entry point... main(); #---code------------------------ sub main { mySub(1); tbSub(2); mySub(3); } #------------------------------- sub mySub { my $parm = shift; print "\nTester: $parm\n"; } </code></pre> <hr> <p><strong>Perl OO</strong></p> <pre><code>#! /usr/bin/perl #The base class to inherit from package TestBase; use strict; use warnings; #------------------------------- sub new { my $s={ }; return bless $s; } sub tbSub { my ($self,$parm) = @_; print "\nTestBase: $parm\n"; } 1; </code></pre> <p>.</p> <pre><code>#! /usr/bin/perl #The descendent class use strict; use warnings; use TestBase; sub main; sub mySub; #------------------------------- #Entry point... main(); #---code------------------------ sub main { my $tb = TestBase-&gt;new(); mySub(1); $tb-&gt;tbSub(2); mySub(3); } #------------------------------- sub mySub { my $parm = shift; print "\nTester: $parm\n"; } </code></pre>
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