The fastest function to write a mpz number in a .txt file

[jojo 29]

:)
I've read this manual. But, English is not my native language so it is not 
really easy for me... and some times, I need many explications (many points 
of view) to understand. Then, in this manual, there is not a lot of "source 
codes - examples". That's why I ask if someone could be nice enough to post 
a little source code which writes a mpz number in a txt file. Or to explain 
me how to use the mpz_out_str function.

If everybody is really busy, I'll find by myself but I could save a few 
time.

Regards.

>From: Torbjorn Granlund <tege at swox.com>
>To: "jojo 29" <jojo29118 at hotmail.com>
>CC: gmp-discuss at swox.com


>
>"jojo 29" <jojo29118 at hotmail.com> writes:
>
>   I would like to write a mpz number in a .txt file (or a .doc file). What 
>is
>   the fastest function to do this? Could you post a little example source 
>code
>   (for beginners like me)?
>
>There is a very useful document included with GMP that answers
>this and many other GMP-related questions: The GMP manual.
>
>(It is available online too: http://swox.com/gmp/manual/)
>
>--
>Torbjörn