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From: kjetil@ifi.uio.no (Holm-Kjetil Holmsen)
Newsgroups: comp.lang.c++
Subject: Re: discrete-event simulation in C++
Message-ID: <1990Aug23.103223.8754@ifi.uio.no>
Date: 23 Aug 90 10:32:23 GMT
References: <2533@ryn.esg.dec.com> <5606@abaa.UUCP>
Sender: kjetil@ifi.uio.no (Holm-Kjetil Holmsen)
Reply-To: kjetil@ifi.uio.no (Holm-Kjetil Holmsen)
Organization: Dept. of Informatics, University in Oslo, Norway
Lines: 32
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Originator: kjetil@svarte.ifi.uio.no


In article <5606@abaa.UUCP>, korsberg@abaa.uucp (Ed Korsberg) writes:
>
> Also have you though about using Smalltalk for you simulation?  
> I think that C++ is an attempt to mimic some of the concepts promoted in
> Smalltalk.  
> 
Not quite right!  C++ _originally_ was an attempt to mimic the _simulation_
part of SIMULA-67.  

> Smalltalk already has simulation classes for doing discrete event
> simulation, although I do not know if it can do higher level process
> simulation.
> 

The funny part of this is that the Smalltalk simulation classes are (at 
least was) based on the SIMULA-67 simulation concept.  Actually, the 
idea of Smalltalk was born when Allan Key learned about SIMULA doing his 
Ph.D. thesis.  The chapter on simulation in the "Smalltalk books" is more
or less a copy of the chapter on "class simulation" in the book
"SIMULA BEGIN" by O-J Dahl et. al.  The "carwash" example is a _direct_
copy.

Simula originated in the beginning of the '60s, as an Algol based
language for descrete event simulation.  This language was refined,
and emerged as a superset of Algol-60 in 1967: a block-structured
laguage with the class concept (with inheritance and virtuals)

Holm-Kjetil Holmsen, C.Sc student		email: kjetil@ifi.uio.no
Dept. of Informatics
University of Oslo
NORWAY