[fpc-pascal] PASCAL programming for Novice

[Leonardo M. Ram�]

Francisco, that's not only a class, it's a Program containing the THelloWorld class.

With Object Pascal (and Pascal), you can divide your program in units, then use those units in a
program.

Example:

------------------------------------
Unit HelloWorld;

interface

type
  THelloWorld = class
    procedure Put;
  end;

implementation

procedure THelloWorld.Put;
begin
  WriteLn('Hello, World!');
end;

end.
------------------------------------
program MyProgram

uses
  HelloWorld; // this includes HelloWorld into your program

var
  myHelloWorl: THelloWorld;  // to declare a variable of type THelloWorld

begin
  myHelloWorld := THelloWorld.Create;  // to create an instance of THelloWorld.
  myHelloWorld.Put;                    // to execute Put method.
  myHelloWorld.Free;                   // to destroy the instance.
end.
-----------------------

Leonardo M. Ramé
http://leonardorame.blogspot.com

--- Francisco Reyes <lists at stringsutils.com> wrote:

> Michael Van Canneyt writes:
> 
> > Both Turbo Pascal's Object Pascal and Delphi's object pascal are 
> > supported, depending on which mode you compile in.
> 
> If I have a class like:
> program myclass;
>  type
>    THelloWorld = class
>      procedure Put;
>    end;
>  var
>    HelloWorld: THelloWorld;
>  procedure THelloWorld.Put;
>  begin
>    WriteLn('Hello, World!');
>  end;
>  begin
>    HelloWorld := THelloWorld.Create;
>    HelloWorld.Put;
>    HelloWorld.Free;
>  end.
>  
> 
> How do I use that class in another program?
> 
> 
> _______________________________________________
> fpc-pascal maillist  -  fpc-pascal at lists.freepascal.org
> http://lists.freepascal.org/mailman/listinfo/fpc-pascal
> 



       
____________________________________________________________________________________
Need a vacation? Get great deals
to amazing places on Yahoo! Travel.
http://travel.yahoo.com/