is it the book by SAMS? I've got that.... it's been a year.... i dont know C++..
Im so lazy
the book teaches you c++. file i/o wouldn't be learning c++, but learning a specific c++ library. the book teaches you everything you need to know to be able to say "I know c++". experience will bring the rest.
Once you really understand how c++ works, you can work with other peoples' code (such as a file i/o library).
basically, the book does what it says it does. If you want to know how to do something specifically, look it up.
Here you go