Is it possible to format C++ code with VIM?

Question

I am rather new to VIM. I got some source code and this is a mess. At a first sight I would like at least to get a clear and organised view of the code, so I like to get it

Answer 1

I don't write C++ code, but I write some Java code.

Instead, Vim supports the formatting of some common languages. I have set up a short cut for me to format the whole code in the buffer. It will return to the line I just edited :)

" format the file
map fm gg=G'.