From: nw@retrocomputingtasmania.com (Nigel Williams)
Subject: [TUHS] origin of C header files
Date: Fri, 29 Dec 2017 21:58:28 +1100 [thread overview]
Message-ID: <CACCFpdyMwZJvZ30kQCwVuRMRfFggfth7hTk=CEUO_2bu=tNAmg@mail.gmail.com> (raw)
In-Reply-To: <CACNPpeYw3maUqXr8NxotW9FZMjhJmm-K9kEv2ma6SytiQB=1cg@mail.gmail.com>
On Fri, Dec 29, 2017 at 7:26 PM, Wesley Parish <wobblygong at gmail.com> wrote:
> Which raised the question: when did header files come into use? Who
> was the first to use header files to store common system-wide or
> application-wide data definitions? Was it used in any languages prior
> to C?
COBOL 60 (April 1960) had INCLUDE (page V-27):
http://bitsavers.trailing-edge.com/pdf/codasyl/COBOL_Report_Apr60.pdf
FUNCTION: To save the programmer effort by automatically incorporating
library subroutines into the source program.
It even had a literal substitution mechanism to rewrite the included text.
next prev parent reply other threads:[~2017-12-29 10:58 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-29 8:26 Wesley Parish
2017-12-29 10:58 ` Nigel Williams [this message]
2017-12-29 19:28 ` Paul Winalski
2017-12-29 20:31 ` Clem Cole
2017-12-30 1:06 ` Steve Johnson
2017-12-30 1:52 ` Paul Winalski
2018-01-23 4:27 ` Steve Johnson
2017-12-31 2:32 Doug McIlroy
2018-01-12 8:44 Lars Brinkhoff
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