Very Computer

  \let\chapter=\part

Or do you want to have a separate part structure on top of the
existing chapter structure?

In short, it's not clear why you want to use chapters to specify
what are otherwise called parts.
--

U of Cambridge Computer Lab, Pembroke St, Cambridge  CB2 3QG, UK
Private page: http://www.cl.cam.ac.uk/users/rf/robin.html

- If your aim is to change `Chapter' to any other word (`Part' or
  anything else) you just have to re-define the macro \chaptername.
  But take care, this is also done in each package managing foreign
  languages, like `babel'.

- If your aim is to obtain `1st' instead of `1' this is a bit more
  difficult, and a `case of' construction seems to be a good idea,
  something like:
  \ifcase{\value{chapter}}\or 1st\or 2nd\or 3rd\or... \fi
  may give you good results.

You can, of course, use both together to obtain `1st part' instead of
`Chapter 1'.

And, last but not least, Robin's remark is of great meaning...

As you are french, a few comments in french:
Je n'ai pas compris clairement si vous souhaitiez creer un nouveau niveau
de sectionnement qui se nomerai `Part' ou si vous cherchiez tout simplement
a creer des en-tete du type `Chapitre premier'. En tout etat de cause, je
pense que les deux pistes que je vous donne ici devraient etre suffisantes

Bien a vous,

--
Benjamin BAYART                 A French student on an English network
TeX Administrator at ESIEE
Administrateur TeX a l'ESIEE


GEUT (Groupe des Esieeens Utilisateurs de TeX) alias
TUGE (TeX User Group of ESIEE).