\begin{flushleft}
\begin{minipage}[t]{\textwidth}
\hrulefill

\vspace*{-5mm}

\begin{verbatim}
#include<iostream.h>
#include<LINK/basic/List.h>

main()
{
        List<int> l;

        l.insert(1);
        l.insert(2);
        l.insert(3);
        l.insert(4);

        Iterator<int> get_next(&l);
        int i;
        while (get_next(i))
                cout << "next element: " << i << endl;
}

\end{verbatim}

\vspace*{-7mm}

\hrulefill

\vspace*{-5mm}

\begin{verbatim} 
next element: 4
next element: 3
next element: 2
next element: 1
\end{verbatim}

\vspace*{-6mm}

\hrulefill
\end{minipage}
\end{flushleft}