%% 
%%  A DANTE-Edition example
%% 
%%  Example 02-07-5 on page 58.
%% 
%%  Copyright (C) 2010 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.
%% 
%% 
%% ==== 
% Show page(s) 1
%% 
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{225.70511pt}
\setlength\parindent{0pt}
\usepackage[textheight=8cm,textwidth=7cm]{geometry}

\usepackage{ctable}

\begin{document}
\ctable{@{}lcr@{}}{}{%
  \emph{left} & \emph{centred}
    & \emph{right}\\\hline
  l    & c      & r\\
  left & center & right }
\ctable[left]{@{}lcr@{}}{}{%
  \emph{left} & \emph{centred}
    & \emph{right}\\\hline
  l    & c      & r\\
  left & center & right }
\ctable[right]{@{}lcr@{}}{}{%
  \emph{left} & \emph{centred}
    & \emph{right}\\\hline
  l    & c      & r\\
  left & center & right }
\end{document}