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Jochen Küpper wrote:
> "Xiaopeng Xiong" <xpxiong@purdue.edu> writes:
> 
> 
>>formatting a single file is enough for me. If you know any command
>>to do so, please help!
> 
> 
> C-PgUp C-<SPC> C-PgDn M-x indent region or similar...

Alternatively use a seperate tool such as gnu indent...

http://www.gnu.org/software/indent/indent.html

I find this a much better way to go for indenting
multiple files... also indent will do formating that
emacs will not! such as moving the position of
braces.

Although emacs is the One True Editor.. sometimes
it is better to use other tools.

Paul