Thank You all for reply; so: 1. generate_throws_simple consists of: 
sub generate_throws_simple {
for(my $i = 0; $i < $main::b; $i++)
{
push(@main::wyniki, int(rand($main::a)+1));
}
}
1;

[download]
2. modules::gts or rather just gts - wrong copy/paste, but gts module file is in main folder as well

3. UNFORTUNATELY, I need to use "require" instead of "use" in that exercise;

is it possible? if yes, how should I do that?

In reply to Re^2: Undefined subroutine - newbie problem by blackhat
in thread Undefined subroutine - newbie problem by blackhat

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