Well when you compile C source code with the GCC compiler and don't specify the output file it will get the default name "a.out".
It's an binary executable file that you can run with the command "./a.out".
I'm not sure where you got this file from, so I would suggest opening it in an editor and see if you can get any hints from that.
Last edited by zeroflaw
on Fri Feb 19, 2010 6:00 am, edited 1 time in total.