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From: zhou@brazil.psych.purdue.edu (Albert Zhou)
Newsgroups: comp.lang.pascal
Subject: Re: OOP
Message-ID: <11676@j.cc.purdue.edu>
Date: 12 Jan 91 13:46:02 GMT
References: <25462@adm.brl.mil>
Sender: news@j.cc.purdue.edu
Reply-To: zhou@brazil.psych.purdue.edu (Albert Zhou)
Organization: Purdue University
Lines: 47


I have a very practical description of OOP. An object is actually a module
with declarations (descriptors, as it is called) and subroutines (methods,
as it is called).  

Any non-modular language, after implementing object data type, can achieve
modularity.     


A module:

Module anything;
const
  a = 3;
  b = 4;
var
  c : real;


proc null;
endproc;

proc null2;
endproc;

endmodule.


An object in Turbo Pascal:

type
  anything = object
    a : integer;
    b : integer;
    c : real;
   
    procedure null;
    procedure null2;
  end;

procedure anything.null;
begin
end;

procedure anything.null2;
begin
end;