Hm, I'm getting this:

    sistertrain-lm :~
    [22:15:45 isaacs] $ gcc westley.c 
    westley.c:31:7: error: invalid suffix "s" on integer constant
    westley.c:93:17: error: invalid suffix "s" on integer constant
    westley.c:99:8: error: invalid suffix "s" on integer constant
    westley.c: In function 'main':
    westley.c:107: warning: incompatible implicit declaration of built-in function 'exit'

After replacing the 1s with 1, I'm seeing this instead:

    sistertrain-lm :~
    [22:17:12 isaacs] $ gcc -o westley westley.c 
    westley.c: In function 'main':
    westley.c:107: warning: incompatible implicit declaration of built-in function 'exit'

    sistertrain-lm :~
    [22:17:16 isaacs] $ ./westley 
    Bus error

Edit Oohh, you have to do ./westley <number>. That's clever. :)