Update documentation

1 files changed, 18 insertions, 17 deletions

diff --git a/Aufgabe6/RPN/lib/RPN.pm b/Aufgabe6/RPN/lib/RPN.pm
index 693ca51..6e8f5b1 100644
--- a/Aufgabe6/RPN/lib/RPN.pm
+++ b/Aufgabe6/RPN/lib/RPN.pm
@@ -391,41 +391,43 @@ sub rpn {
 
 1;
 __END__
-# Below is stub documentation for your module. You'd better edit it!
+# Below is the documentation for RPN.
 
 =head1 NAME
 
-RPN - Perl extension for blah blah blah
+RPN - Perl extension that implements simple RPN functionality.
 
 =head1 SYNOPSIS
 
   use RPN;
-  blah blah blah
+
+  RPN::rpn("5 5 +");
 
 =head1 DESCRIPTION
 
-Stub documentation for RPN, created by h2xs. It looks like the
-author of the extension was negligent enough to leave the stub
-unedited.
+This module makes it possible to calculate in reverse polish notation.
 
-Blah blah blah.
+=over 1
 
-=head2 EXPORT
+=item rpn()
 
-None by default.
+This is the evaluation function for an RPN string.
 
+Input:
+  $rpnString - The String with an RPN expression.
 
+Output:
+  undef if an error occured otherwise the result of the upn evaluation.
 
-=head1 SEE ALSO
+=back
 
-Mention other useful documentation such as the documentation of
-related modules or operating system documentation (such as man pages
-in UNIX), or any relevant external documentation such as RFCs or
-standards.
+=head2 EXPORT
 
-If you have a mailing list set up for your module, mention it here.
+None by default.
+
+=head1 SEE ALSO
 
-If you have a web site set up for your module, mention it here.
+https://en.wikipedia.org/wiki/Reverse_Polish_notation
 
 =head1 AUTHOR
 
@@ -439,5 +441,4 @@ This library is free software; you can redistribute it and/or modify
 it under the same terms as Perl itself, either Perl version 5.22.0 or,
 at your option, any later version of Perl 5 you may have available.
 
-
 =cut