unknown what?

[cottrell at nbs-vms.ARPA]

/*
how long have you been programming? in case you haven't noticed
most compilers spit out cryptic errors when a required delimeter is
missing. perhaps languages can be designed that produce more lucid
error messages, such as 'unknown keyword "foo", probable missing
delimeter ";" or "}"', but C is very sparse. in your case at least
the reported line number should be close.
*/