Le 26/07/2015 20:19, T.J. Duchene a écrit :
On 07/26/2015 11:08 AM, Hendrik Boom wrote:
I also had a long discussion with some of the guys in charge of the
ADA project -- they really wanted the security that comes from
completely automatic storage management but they couldn't afford to
have their weapons systems stop for garbage collection,
I told them exactly what the trade-offs were -- too what extent they
could have their cake and eat it too. In the end they decided that
they could afford neither the language complexity of the
garbage-collector-free storage management schemes, nor the garbage
collection delays. I'm not sure to what extent they ended up avoiding
dynamically allocated storage in the first official language
definition.
ADA! I remember that! I've not used it in the better part of 20
years. Nicely designed language for its time - and very strict.
Having learned C in advance of ADA, I never liked its Pascal style
operators.
Too bad the only one who really uses it in the US is the government.
Ada is not an acronym, it's after the first name of the first
person who wrote programs, the daughter of Byron, the english poet.
Ada is used in many places where human life is at stake: eg.
planes, missiles, Eurocontrol (the european air cirulation regulation),
the driver-less metro in Paris. The initial version was Ada83. There
have been some revisions since. Add95 was a major one and the last is
Ada2012.
The affectation operator is := instead of = in C, and the
comparison are = (instead of ==) and /= instead of != . The bad choice
of operators, together with other tricks is probably the main source of
bugs in C programs.
Didier
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