The root directory on Windows is considered to be the root directory of drive of the current working directory. But "/*.c" will probably return nothing on most systems because nobody should be keeping c files in their root directory. [Actually, it looks like windows does not have just one CWD for each program. It appears to have one per drive, as well as CWHD (current working hard drive). The deafult CWD is the CWD of the CWHD].It's difficult to imagine what "/*.c" would do on a Windows system.