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Working with directories.

Using the C POSIX Library

and unistd.h:

Using the Boost C++ Library

The Boost filesystem lib has been accepted by the C++ Standard committee and will mostly be part of the future C++ standard. Thus it makes sense to use it.

Beware: the "2 minute" tutorial is rather buggy. See:
#125: error: namespace ‘boost::filesystem’ not allowed in using-declaration