\begin{figure}[H]
  \begin{center}
    \unitlength=4pt
    \begin{picture}(60, 12)(0,-3)
    \gasset{Nw=5,Nh=5,Nmr=2.5,curvedepth=0}
    \thinlines
    \node[Nmarks=i,iangle=180](A1)(0,0){$1$}
    \node(A2)(15,0){$2$}
    \node(A3)(30,0){$3$}
    \node(A4)(45,0){$4$}
    \node[Nmarks=f,fangle=0](A5)(60,0){$5$}
    \drawloop[loopangle=90](A3){$.,/$}
    \drawloop[loopangle=90](A4){$*$}
    \drawedge(A1,A2){$/$}
    \drawedge(A2,A3){$*$}
    \drawedge(A3,A4){$*$}
    \drawedge(A4,A5){$/$}
    \gasset{curvedepth=4}
    \drawedge(A4,A3){$.$}
    \end{picture}
  \end{center}
  \caption{Commentaires en C.}
\end{figure}