28 Sep
2014
28 Sep
'14
7:11 a.m.
On Sep 28, 2014, at 9:35 AM, Mouse <mouse at rodents-montreal.org> wrote:
Restricted I/O: not true. Pascal does I/O exactly as C does, by library calls. Its I/O
is exactly as powerful as what the library supplies. If you hook it up to libc, it?s the
same as C, obviously.
In fact, a lot of programming languages use this approach; Fortran and Basic and a few
other 1960s era languages are probably the exception rather than the rule in having
dedicated I/O statements. C, C++, Algol 60, Algol 68, Pascal, Python 3 ? all do I/O by
functions. You can get any level of I/O sophistication you want without changing the
language at all.
Obviously the size of the common I/O libraries has changed over time, and in fact one
reason that was doable is that it could be done without changing any of the languages that
use it.
paul
Wasn't
Apollo Computer's Domain OS written in Pascal?
I feel reasonably sure it was not.
It may, however, have been written in a Pascal-plus-extensions
language.
This may sound like quibbling, but I don't think so. One of Pascal's
major defects for purposes like that[%] was its lack of support for
things like what C would call casting, or the very restricted I/O
available.