|[5 earlier articles]|
|Re: Is multi-level function return possible? firstname.lastname@example.org (Andy Walker) (2014-03-16)|
|Re: Is multi-level function return possible? email@example.com (Bill Findlay) (2014-03-17)|
|Re: Is multi-level function return possible? firstname.lastname@example.org (2014-03-18)|
|Re: Is multi-level function return possible? email@example.com (Andy Walker) (2014-03-21)|
|Re: Is multi-level function return possible? firstname.lastname@example.org (2014-03-24)|
|Re: Is multi-level function return possible? email@example.com (Andy Walker) (2014-03-26)|
|Re: history of C, was Is multi-level function return possible? firstname.lastname@example.org (glen herrmannsfeldt) (2014-03-27)|
|From:||glen herrmannsfeldt <email@example.com>|
|Date:||Thu, 27 Mar 2014 00:05:36 +0000 (UTC)|
|Organization:||Aioe.org NNTP Server|
|References:||14-03-020 14-03-022 14-03-025 14-03-030 14-03-044 14-03-046 14-03-047 14-03-048 14-03-053 14-03-057 14-03-061|
|Posted-Date:||26 Mar 2014 20:54:33 EDT|
Andy Walker <firstname.lastname@example.org> wrote:
> But B and C are different languages, with differing design aims
> and criteria. Having a feature in C that was absent from B is not the
> same as adding to C a feature that had previously been removed. K&R C
> was not B Mk 2, but a new language with inputs [conscious or unconscious]
> from many languages, including (B)(CPL) and Algol 68.
> [C was influenced by PL/I. C++ is where the Algol68 got mixed
> in, and some of the C++ stuff was backported into C. -John]
I always believe that until a recent comp.lang.c discussion convinced
The question related to the C conditional operator, which I remembered
in a different form from ALGOL-10 (on TOPS-10) some years ago.
I then looked up in ALGOL-60 and ALGOL-68 manuals to find out how it
changed. Seems that ALGOL-68 also has the assign/arithmetic operators,
such as +:=, -:=, x:- (where that should be a multiply sign, not an
x or *), and some more that I also don't have on the keyboard.
PL/I doesn't (or at least didn't, could have changed by now) have the
conditional operator or the assign/arithmetic operators. Both of
those, at least, go back to K&R C, and before C++.
PL/I is from around 1964 or so, but I don't know the timing
(what happened when) for ALGOL-68 at all.
The two differences I always remember between K&R C and ANSI C are
struct as argument (instead of struct pointer) and initialized auto
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