Fw: [Dev-C++] (no subject)

[Eric <eri...@cl...>]

good its gone from 13K to 7K "WITH MORE TEXT ADDED"

this could the UK tax system VAT "Value Added Text"





----- Original Message -----
From: <age...@co...>
To: "Eric" <eri...@cl...>
Sent: Thursday, October 09, 2003 11:02 AM
Subject: Re: [Dev-C++] (no subject)


HTML e-mails suck unless you need to post graphics inside your e-mail,
need a ton of hyperlinks, or are making a newsletter. If you need
pictures or hyperlinks, use AIM!

--
~~Scott Simontis~~
Programmer
> this "dorkie black font on white HTML Email" came in at 13K in
> file size
> I have converted it to plain text email you will notice the drop in
file
> size, yet looks just the same as the original email "black font on
> white"
>
> for more reading
> http://www.georgedillon.com/web/html_email_is_evil.shtml    (7 REASONS
> WHY HTML E-MAILS ARE EVIL.)
>
>
>
> ----- Original Message -----
> From: David McKen
> To: Dev-Cpp Mailing List
> Sent: Wednesday, October 08, 2003 4:19 PM
> Subject: [Dev-C++] (no subject)
>
>
> Ok how are overflows handled in C++ for integer types?
> I know about the resulting (number % upper_limit) effect which is
> actually what I want. What I am interested in is determining that an
> overflow has occurred.
> So far my searches into the void ... whoops meant the C++ standard,
seem
> to suggest a exception is thrown when a overflow occurs, however I am
> under the impression exceptions are not exactly completely portable
just
> yet, or am I wrong in this belief? The code makes use of classes so I
am
> fairly confident that exceptions are portably supported the question
is
> whether the exception is thrown for this exception. The following
chunk
> of the standard should explain why I am not too sure about this.
> -- Begin Quote --
> [Note: operators can be regrouped according to the usual mathematical
> rules only where the operators really
> are associative or commutative.9) For example, in the following
fragment
> int a, b;
> /*...*/
> a = a + 32760 + b + 5;
> the expression statement behaves exactly the same as
> a = (((a + 32760) + b) + 5);
> due to the associativity and precedence of these operators. Thus, the
> result of the sum (a + 32760) is
> next added to b, and that result is then added to 5 which results in
the
> value assigned to a. On a machine in
> which overflows produce an exception and in which the range of values
> representable by an int is
> [- 32768,+32767], the implementation cannot rewrite this expression as
> a = ((a + b) + 32765);
> since if the values for a and b were, respectively, - 32754 and - 15,
> the sum a + b would produce an
> exception while the original expression would not; nor can the
> expression be rewritten either as
> a = ((a + 32765) + b);
> or
> a = (a + (b + 32765));
> since the values for a and b might have been, respectively, 4 and - 8
> or - 17 and 12. However on a
> machine in which overflows do not produce an exception and in which
the
> results of overflows are
> reversible, the above expression statement can be rewritten by the
> implementation in any of the above ways
> because the same result will occur. ]
>
> -- End Quote --
> This seems to indicate that the overflow is only thrown on machines
that
> produce some sort of exception when an overflow occurs. Also a similar
> exception class exist for underflows the structure seems to be
extremely
> similar to the overflow, I assume if one works then so does the other.
> Also is there some mathematical way to detect such an overflow? So far
I
> am not finding any way, as the result can potentially be anywhere
within
> the full range of numbers represent by the data type. I would rather
not
> try to determine if an overflow would occur by performing the addition
> myself in binary as I am exploring this method to try to increase the
> efficiency of my algorithm and doing the addition "by hand" would
> severely increase the complexity of my algorithm.
> Thanks in Advance
> David McKen
> P.S. In case you are wondering this is not homework but a BigInt class
I
> am trying to create.
>
>
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