Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!ames!ncar!unmvax!pprg.unm.edu!topgun.dspo.gov!lanl!cmcl2!adm!smoke!gwyn
From: gwyn@smoke.BRL.MIL (Doug Gwyn)
Newsgroups: comp.lang.c
Subject: Re: Trigraphs (was Re: Uninitialized externals and statics)
Keywords: trigraphs
Message-ID: <10868@smoke.BRL.MIL>
Date: 29 Aug 89 20:03:54 GMT
References: <2128@infmx.UUCP> <4700042@m.cs.uiuc.edu> <1989Aug25.185428.3511@utzoo.uucp> <609@paperboy.OSF.ORG> <10831@smoke.BRL.MIL> <1392@atanasoff.cs.iastate.edu> <10859@smoke.BRL.MIL> <3776@mentor.cc.purdue.edu>
Reply-To: gwyn@brl.arpa (Doug Gwyn)
Organization: Ballistic Research Lab (BRL), APG, MD.
Lines: 8

In article <3776@mentor.cc.purdue.edu> acu@mentor.cc.purdue.edu (Floyd McWilliams) writes:
>They only needed 8 or 9 distinct trigraphs, and "!" is one of the
>two characters I can think of that have any meaning after "??". 

The only meaning I've ever seen that was considered correct usage is in
chess notation.

I think ??! was chosen as being more mnemonic than other alternatives.