At Mon, 23 Mar 2020 09:46:52 -0400, Clem Cole wrote: Subject: Re: [TUHS] Question: stdio - Who invented and ... > > I've forgotten when 'enum' and 'void' got added (which are not in the white > book - Steve Johnson or Doug may remember). But, I think they were in the > V7 compiler, and not Typesetter C. Since I was recently researching these myself: There was an extra page in the 7th Edition manual titled "Recent Changes to C" which described both structure assignment and the enumeration type: https://www.bell-labs.com/usr/dmr/www/cchanges.pdf This paper appears in the UNIX System III "The C Programming Language Reference Manual", but there's no mention of "void" in that manual. On the other hand the UNIX System III PDP-11 compiler mentions "void" (1980). I don't see any mention of "void" in 7th Edition sources. However the version of 'awk' on the v7addenda tape from "12/2/80" has one "(void)" cast. The only mention of "void" in dmr's "The Development of the C Language" paper (from HOPL-II, 1993) seems to be in the "Standardization" section where it's mentioned that it's not described in the first edition of K&R. There's mention in the CSTR#102 paper from Sept. 1981 of the "void" type. The 2.9BSD code uses "void", but the sources I have don't include a copy of the compiler. -- Greg A. Woods Kelowna, BC +1 250 762-7675 RoboHack Planix, Inc. Avoncote Farms