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user_id=85984

aicheck.c compiled without problem on my system.

% gcc -o aicheck aicheck.c 
%

Running the resulting binary produces no output.  I'm
not exactly sure what kind of output you are looking for
(taking a guess):

% gdb /home/jason/temp/aicheck
GDB is free software and you are welcome to distribute
copies of it
 under certain conditions; type "show copying" to see the
conditions.
There is absolutely no warranty for GDB; type "show
warranty" for details.
GDB 4.16 (i386-unknown-bsdi4.0), Copyright 1996 Free
Software Foundation, Inc...(no debugging symbols found)...
(gdb) run
Starting program: /home/jason/temp/aicheck 
(no debugging symbols found)...(no debugging symbols
found)...(no debugging symbols found)...
Program exited with code 01.