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From: Jochen Kalmbach [MVP] on 19 Jan 2010 01:56
Hi PvdG42!

>> Please can someone give a simple usage example?
>
> I'm as frustrated as you are. After reading your post and the responses
> you got, I thought "how hard could it be?" and now I'm stumped. So,
> meaning no disrespect to anybody, I'm forwarding this to the C++/CLI
> group to see what happens :-)

What examples do you want to see?
It is no big problem to translate C# into C++/CLI...

For example:
BigInteger negativeNumber = -1000000;
BigInteger positiveNumber = 15777216;

string negativeHex = negativeNumber.ToString("X");
string positiveHex = positiveNumber.ToString("X");

BigInteger negativeNumber2, positiveNumber2;
negativeNumber2 = BigInteger.Parse(negativeHex,
NumberStyles.HexNumber);
positiveNumber2 = BigInteger.Parse(positiveHex,
NumberStyles.HexNumber);

Console.WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
negativeNumber, negativeHex, negativeNumber2);

Console.WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
positiveNumber, positiveHex, positiveNumber2);


=>

BigInteger negativeNumber = -1000000;
BigInteger positiveNumber = 15777216;

String^ negativeHex = negativeNumber.ToString("X");
String^ positiveHex = positiveNumber.ToString("X");

BigInteger negativeNumber2, positiveNumber2;
negativeNumber2 = BigInteger::Parse(negativeHex,
NumberStyles.HexNumber);
positiveNumber2 = BigInteger::Parse(positiveHex,
NumberStyles.HexNumber);

Console::WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
negativeNumber, negativeHex, negativeNumber2);

Console::WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
positiveNumber, positiveHex, positiveNumber2);


--
Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/
From: David Wilkinson on 19 Jan 2010 06:42
PvdG42 wrote:
>
> "GeorgCantor" <GeorgCantor(a)discussions.microsoft.com> wrote in message
> news:5D42AABF-96E2-4E95-A537-3739C677C438(a)microsoft.com...
>> One of the new additions to the .NET 4.0 framework is
>> System.Numerics.BigInteger.
>>
>> Please can someone give a simple usage example?
>>
>> Thank you.
>>
>
> I'm as frustrated as you are. After reading your post and the responses
> you got, I thought "how hard could it be?" and now I'm stumped. So,
> meaning no disrespect to anybody, I'm forwarding this to the C++/CLI
> group to see what happens :-)

If you are talking about the thread on the MSDN forum, then I confess that I
incurred the wrath of the OP by refusing to answer his question, but simply
pointed out that *if you know C++/CLI* then translating from C# is very easy,
and is a skill one needs to learn. I then asked him what he had tried.

However if you read the whole thread, I think you will find that the real
problem is not that the OP does not know how to use BigInteger, but rather that
he does not know anything about C++/CLI.

If you are talking about the MSDN .NET documentation, it is regrettable that
there are often no examples in C++/CLI, but that is just the way it is.
Microsoft has given up on trying to make C++/CLI a first class citizen in
..NET-land.

--
David Wilkinson
Visual C++ MVP
From: PvdG42 on 19 Jan 2010 10:18

"Jochen Kalmbach [MVP]" <nospam-news(a)kalmbach-software.de> wrote in message
news:eLUx6RNmKHA.1824(a)TK2MSFTNGP04.phx.gbl...
> Hi PvdG42!
>
>>> Please can someone give a simple usage example?
>>
>> I'm as frustrated as you are. After reading your post and the responses
>> you got, I thought "how hard could it be?" and now I'm stumped. So,
>> meaning no disrespect to anybody, I'm forwarding this to the C++/CLI
>> group to see what happens :-)
>
> What examples do you want to see?
> It is no big problem to translate C# into C++/CLI...
>
> For example:
> BigInteger negativeNumber = -1000000;
> BigInteger positiveNumber = 15777216;
>
> string negativeHex = negativeNumber.ToString("X");
> string positiveHex = positiveNumber.ToString("X");
>
> BigInteger negativeNumber2, positiveNumber2;
> negativeNumber2 = BigInteger.Parse(negativeHex,
> NumberStyles.HexNumber);
> positiveNumber2 = BigInteger.Parse(positiveHex,
> NumberStyles.HexNumber);
>
> Console.WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
> negativeNumber, negativeHex, negativeNumber2);
> Console.WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
> positiveNumber, positiveHex, positiveNumber2);
>
> =>
>
> BigInteger negativeNumber = -1000000;
> BigInteger positiveNumber = 15777216;
>
> String^ negativeHex = negativeNumber.ToString("X");
> String^ positiveHex = positiveNumber.ToString("X");
>
> BigInteger negativeNumber2, positiveNumber2;
> negativeNumber2 = BigInteger::Parse(negativeHex,
> NumberStyles.HexNumber);
> positiveNumber2 = BigInteger::Parse(positiveHex,
> NumberStyles.HexNumber);
>
> Console::WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
> negativeNumber, negativeHex, negativeNumber2);
> Console::WriteLine("Converted {0:N0} to {1} back to {2:N0}.",
> positiveNumber, positiveHex, positiveNumber2);
>
> --
> Greetings
> Jochen
>
> My blog about Win32 and .NET
> http://blog.kalmbachnet.de/

That's exactly the kind of thing I thought would work as a demo, and I
appreciate your code. I also agree that translation from C# to C++/CLI for
demos should be trivial.

So, (in VS 2010 Premium b2 running on Win 7 x64) I created a C++/CLI console
app, added:

using namespace System::Numerics;

then put some demo code you offered in main(),

I get:
"error C2039: 'Numerics': is not a member of 'System'"
"error C2871: 'Numerics': a namespace with this name does not exist"

I'm sure it's something my old brain has simply forgotten?




From: PvdG42 on 19 Jan 2010 10:25

"David Wilkinson" <no-reply(a)effisols.com> wrote in message
news:#8WUsxPmKHA.5728(a)TK2MSFTNGP06.phx.gbl...
> PvdG42 wrote:
>>
>> "GeorgCantor" <GeorgCantor(a)discussions.microsoft.com> wrote in message
>> news:5D42AABF-96E2-4E95-A537-3739C677C438(a)microsoft.com...
>>> One of the new additions to the .NET 4.0 framework is
>>> System.Numerics.BigInteger.
>>>
>>> Please can someone give a simple usage example?
>>>
>>> Thank you.
>>>
>>
>> I'm as frustrated as you are. After reading your post and the responses
>> you got, I thought "how hard could it be?" and now I'm stumped. So,
>> meaning no disrespect to anybody, I'm forwarding this to the C++/CLI
>> group to see what happens :-)
>
> If you are talking about the thread on the MSDN forum, then I confess that
> I
> incurred the wrath of the OP by refusing to answer his question, but
> simply
> pointed out that *if you know C++/CLI* then translating from C# is very
> easy,
> and is a skill one needs to learn. I then asked him what he had tried.
>
> However if you read the whole thread, I think you will find that the real
> problem is not that the OP does not know how to use BigInteger, but rather
> that
> he does not know anything about C++/CLI.
>
> If you are talking about the MSDN .NET documentation, it is regrettable
> that
> there are often no examples in C++/CLI, but that is just the way it is.
> Microsoft has given up on trying to make C++/CLI a first class citizen in
> .NET-land.
>
> --
> David Wilkinson
> Visual C++ MVP

Hi, David :-)
No good deed goes unpunished, eh? I've been there many times. I was not
aware of the extended thread. The thread I forwarded from was started by
"GeorgCantor" in dotnet.framework, I thought more could be learned here, as
it has.
I fully agree that it's a shame the docs don't include more C++/CLI example
code. I also agree that for demos, translation from C# should be easy.
Anyway, thanks for your input!


From: Jochen Kalmbach [MVP] on 19 Jan 2010 11:00
Hi PvdG42!

> "error C2039: 'Numerics': is not a member of 'System'"
> "error C2871: 'Numerics': a namespace with this name does not exist"

You either need to set the target-framework to .NET 4 or add the
appropriate reference:

- System.Numerics.dll

--
Greetings
Jochen

My blog about Win32 and .NET
http://blog.kalmbachnet.de/
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