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by: Rich |
last post by:
I was considering C# for developing a scientific application, but I have
noticed a ~30% difference between VC++ .NET and C# on the same machine,
under identical conditions:
double a = 0,b = 0, c = 0, d = 0, e = 0;
for(int n = 0; n != 6000000; n++)
{
a = n % 5 *2 / 3 - 4 + 6 / 3 - n + n * 2;
b = n * 2.3 - 1 *2 / 3 - 4 + 6 / 3 - n + n * 2;
c = n * 3 / 3.5 *2 / 3 - 4 + 6 / 3 - n + n * 2;
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by: apm |
last post by:
How can the CallConvCdecl class be used? MSDN says it is for compiler
writers. Can a mere mortal use it?
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by: Bret Pehrson |
last post by:
Try this one on for size:
// Managed C++ Project/code
#pragma unmanaged
struct S
{
};
void Func()
{
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by: Bern McCarty |
last post by:
I have run an experiment to try to learn some things about floating point
performance in managed C++. I am using Visual Studio
2003. I was hoping to get a feel for whether or not it would make sense to
punch out from managed code to native code (I was using
IJW) in order to do some amount of floating point work and, if so, what that
certain amount of floating point work was
approximately.
To attempt to do this I made a program that...
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by: Ian Lazarus |
last post by:
Hello,
I tried to confirm that two different heap allocation calls were being made,
i.e., one for __gc and one for __nogc. However, the addresses of the calls
(as seen in disassembly) are not what I expected. As you can see the four
calls in tmain are all to the same routine, while the one in the class
constructor is different. Does anybody know what's going on here?
Thanks
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by: Brian Victor |
last post by:
I'm trying to get FFTW (fftw.org) to work in such a way that it can be
called from a managed C++ module. The approach I've found to generate
the fewest linker errors is a mixed managed/unmanaged project.
However, that still produces the following from the linker:
FFTW2 error LNK2020: unresolved token (0A0000C6) fftw_execute
Running ildasm on the resulting dll shows:
..method public static unmanagedexp void
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by: Sam Carleton |
last post by:
I am searching and searching and cannot figure out how to define a
Managed C++ delegate as a CallConvCdecl. Does anyone know if it
can be done and if so, how? The delegate current looks like this:
__delegate Int32 FPtrTestoutProc(LPCTSTR, UInt32);
Sam
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by: bonk |
last post by:
Hello,
I am currently trying to wrap my head around what actually happens when
I compile a normal (native) c++ class with the /CLR Flag in Visual C++
2005 (C++/CLI).
Suppose I have the following class deklared in c++:
// #pragma managed or #pragma unmanaged
// does not seem to make any differnce here
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by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: isladogs |
last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM).
In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules.
He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms.
Adolph will...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: TSSRALBI |
last post by:
Hello
I'm a network technician in training and I need your help.
I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs.
The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols.
I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
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