Rich kids are into COBOL

Johnny Billquist bqt at
Fri Feb 27 16:03:59 CST 2015

On 2015-02-27 22:57, Chuck Guzis wrote:
> On 02/27/2015 01:18 PM, Johnny Billquist wrote:
>> No, C was developed for/on the PDP-11. Unix was originally
>> implemented  was then ported to the
>> PDP-11, and then rewritten in C.
> Although ++ and -- were convenient for code writers, they did lead to
> some "it depends" implementation details WRT function calls.  I assume
> that ANSI C has straightened that all out, but I still avoid that type
> of thing by habit.

I'm not aware of any ambiguity WRT function calls, but you do have a 
ambiguity WRT the same argument being used multiple times (incluiding if 
you have increments on it) as the order of evaluation of any part of a 
statement in C is undefined except for some special cases.

> Digressing a bit, I recall talking with a fellow from Xerox on Coyote
> Hill Rd. (not Xerox PARC) back in the early 80s and being surprised that
> he said they coded in B.  Was this the same B developed on the PDP-7? Or
> was it some other beast?

I don't think B was developed on a PDP-7, only that it existed for the 
PDP-7, among other machines.
Not that Unix was ever written in B anyway, but I believe that B did 
exist for the PDP-7.


Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol

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