I am trying to come up with an idea for a final project in my C programming class and can't think of a good one.
The program is to be made in Pelles C as a win32 console program and must contain the following:

Must use "functions"
Must use "if" statements
Must contain "loops"
Must have a "menu"
Must end with a "sentinel"
and it must contain at least 150 lines of code.

any ideas on what i should write?
any idea and maybe some hints on how to make the program flow would be much appreciated.

THANKS!