Division by Zero

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4 total messages Started by Hugo Mind Mon, 18 Aug 2003 17:44

#923

Author: Hugo Mind
Date: Mon, 18 Aug 2003 17:44

19 lines
1567 bytes

why is this exception never called ?

procedure TForm1.Button1Click(Sender: TObject);
  var
    x : real;
begin
  try
    x := (2 /0);
  except
    on e: exception do showmessage('eRRoR');
  end;
end;


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Re: Division by Zero

#924

Author: KLinZ
Date: Mon, 18 Aug 2003 17:59

22 lines
2095 bytes

Hugo Mind wrote:

> why is this exception never called ?
>
>   try
>     x := (2 /0);
>   except
>     on e: exception do showmessage('eRRoR');
>   end;

Probably because the line which contains x := (2 /0);' has been deleted by
the optimizer. Hence the warning "Value assigned to 'x' never used". Try
compiling with optimization turned off and see what happens.

Or is the above code an excerpt from more complex code?

BTW: it doesn't compile at all on my archaic Delphi version (D3). It gives
an error: 'Overflow in conversion or arithmetic operation'. What Delphi
version are you using?

-- 
www.zenobits.com

Re: Division by Zero

#925

Author: Hugo Mind
Date: Mon, 18 Aug 2003 18:24

7 lines
1463 bytes



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Re: Division by Zero

#926

Author: Hugo Mind
Date: Mon, 18 Aug 2003 18:26

41 lines
2407 bytes

Delphi 7 ent.

this is all code, i found this problem in my application and to sure i
create an new project just to see how the division is handled.
I even re-install delphi.

cheers


"KLinZ" <klinz@NOSPAMMERTSzenobits.com> wrote in message
news:bhr473$87v$1@hermes.castel.nl...
> Hugo Mind wrote:
>
> > why is this exception never called ?
> >
> >   try
> >     x := (2 /0);
> >   except
> >     on e: exception do showmessage('eRRoR');
> >   end;
>
> Probably because the line which contains x := (2 /0);' has been deleted by
> the optimizer. Hence the warning "Value assigned to 'x' never used". Try
> compiling with optimization turned off and see what happens.
>
> Or is the above code an excerpt from more complex code?
>
> BTW: it doesn't compile at all on my archaic Delphi version (D3). It gives
> an error: 'Overflow in conversion or arithmetic operation'. What Delphi
> version are you using?
>
> -- 
> www.zenobits.com
>


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Checked by AVG anti-virus system (http://www.grisoft.com).
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