How to rename multiple files in a folder at once?

Hi friends!
I have a folder containing a lot of songs, all in mp3 format. I want to create a program to rename them at once using a definite pattern.

Right now I only know how to rename a file using the rename function.

Please guide me in the right direction. I just want to know how to read a folder / directory for the files contained in it. I do not want you to code the whole program. Just guide me by naming some functions that are useful in this case.

Any help is appreciated!

Which operating system are you using?

Microsoft Windows XP
(32 bits, SP2)

Also, I am using MVC++ 6.0.

How to get a list of files

Given a filename in a string like say
std::string filename = "file01.mp3";
do you know enough string operations to create
std::string new_filename = "file - 01.mp3";

Then you just do
rename( filename.c_str(), new_filename.c_str() );

install cygwin, use bash

$ for f in *.mpg ; do echo mv $f ${f!} ; done

when you get ! correct either remove echo or pipe the works to bash.

Thank you, friends!