Is it possible to have data stuctures like in C ?

I'am a very fresh R user and I'd like to know how I could create such
structures.

I saw R was objects-oriented but I can not find any doccumentation on
about how to build my hown ojects.

You can build arbitrarily complex structures using lists (and lists of
lists, and...).

This isn't what people mean when they describe R as object-oriented,
though.

There are two systems for handling generic and method functions, so you
can say
    print(x)
or
    plot(x)

and the appropriate function for printing or plotting an `x' will be
called.

While there is some documentation (see ?class, ?UseMethod, and help for
the `methods' package) and there are quite a lot of examples in R itself
and in the Bioconductor project you probably want to read a book on S
programming.

	-thomas