%% 
%%  Ein Beispiel der DANTE-Edition
%%  
%%  1. Auflage
%% 
%%  Beispiel 15-02-34 auf Seite 752.
%% 
%%  Copyright (C) 2011 Herbert 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.
%% 
%% 
%% ==== 
verbatimtex
%% 
\documentclass[]{article}
\usepackage[T1]{fontenc}
\begin{document}
etex
% --- start of displayed preamble in the book ---
input rboxes;
% --- end of displayed preamble in the book ---
beginfig(1)
boxit.Rechteck(btex \texttt{boxit} etex);
Rechteck.c = (0,0);
drawboxed(Rechteck);
circleit.Kreis(btex \texttt{circleit} etex);
Kreis.c = (0,30);
drawboxed(Kreis);
rboxit.Oval(btex \texttt{rboxit} etex);
Oval.c = (0,60);
drawboxed(Oval);
endfig;
end;
\end{document}