I need to know about c++ file system with best example?

C++ is not a file system. It is a programming language.





C++ can be used to access a file system, but you have not given us any details as to *which* file system you want to access (or at the very least, which OS you are looking to code towards).





Have you looked at any of the C++ POSIX functions?





Have you asked Google? Google is your friend (see link below).