%% 
%%  A DANTE-Edition example
%% 
%%  Beispiel 02-27-1 auf Seite 107.
%% 
%%  Copyright (C) 2010 H. Voss
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

%%Run also: >>  << 
% Show page(s) 1

\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{170.59192pt}
\setlength\parindent{0pt}
\usepackage[utf8]{inputenc}

\usepackage{polytable}

\begin{document}
\begin{pboxed}
\column{A}{l}\column{B}{l}
\column{C}{l}\column{D}{l}
\={A} function
  \>[B] \textbf{fact(n: integer)}: integer;\\
\>[B] begin \>[C]\qquad \>[D]\qquad\\
    \={C} if $n>1$ then \\
	\={D} fact:= n * fact(n-1) \\
    \>[C] else \\
	\>[D] fact:= 1; \\
\>[A] end;
\end{pboxed}
\end{document}