t4k_common is the new library that contains code shared by tuxmath and (in the near future) tuxtype.  The library includes support for the Doxygen semi-automated documentation system, which relies on structured comments for functions, typedefs, and the like.

The current Doxygen comments could be made more complete.

This task will involve studying the documentation for Doxygen itself, then going through the source files for t4k_common and making sure the comments are complete.

You should work from a git clone (see our website at http://tux4kids.alioth.debian.org), then submit your completed work as a patch (i.e. a diff between your completed version and the checked-out version)