Hi tarun,
the problem is, you are not getting any new idea for doing a final year project..
:)
Google with "Final Year Projects" or
http://sourceforge.net/[
^]
http://www.sourcecodesworld.com/project-bank/[
^]
you can get a lot of project ideas.
Not only the idea, some sites provide source code also.
You are well confident in C/C++, then leave the source code, just take the project ideas..
All the best..
BIJU