Re: Conversion to LONGLONG - C / C++ / MFC Discussion Boards

fardak13-Apr-05 0:02

13-Apr-05 0:02

I changed the "message.Format(..)" as you suggested,and the code compiles,runs and gives the result expected(i.e both dwords are dislpayed in the edit control).
Thank you so much for your time and effort.
I am sure your skill will be soon appreciated by someone.
Good luck.

Re: Conversion to LONGLONG

David Crow13-Apr-05 2:36

David Crow

13-Apr-05 2:36

What about using:

message.Format("%I64x", ...);

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Re: Conversion to LONGLONG

Joel Holdsworth13-Apr-05 3:21

Joel Holdsworth

13-Apr-05 3:21

Ah yes... Well I've never used that one before!

Joel Holdsworth

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Re: Conversion to LONGLONG

fardak13-Apr-05 4:42

fardak

13-Apr-05 4:42

Thank for your time.
It works perfectly well.

Re: Conversion to LONGLONG

Michael Dunn13-Apr-05 2:20

Michael Dunn

13-Apr-05 2:20

Use _atoi64()

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Visual C++ MVP Cool | :cool:

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Re: Conversion to LONGLONG

fardak13-Apr-05 4:35

fardak

13-Apr-05 4:35

Thank you.
I have difficulty formatting a string to display the result.
Here is what I wrote:
//////////////////////////////////
CString message;
_int64 myNb;
myNb=_atoi64("FFFFFFFFFFFFFFFF");
message.Format("%16X",myNb);//WRONG
How the formating should be written ?
Thanks for any help.

Re: Conversion to LONGLONG

Michael Dunn13-Apr-05 7:22

Michael Dunn

13-Apr-05 7:22

Because %X is used to format a 4-byte integer. When you pass an 8-byte integer, use the I64 size modifier: %16I64X.

--Mike--
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Re: Conversion to LONGLONG

fardak13-Apr-05 22:44

fardak

13-Apr-05 22:44

Thank you.
I am trying to find the value of a LONLONG
and display it in decimal.
This is what I wrote
//////Convert LONGLONG to binary ///////////
TCHAR mystring[sizeof(LONGLONG)*8+1]
for(int i = 0; i < sizeof(LONGLONG)*8; i++)
mystring[i] = ((theNb >> (sizeof(LONGLONG)*8 - i - 1)) & 1) ?
_T('1') : _T('0');
mystring[sizeof(LONGLONG)*8] = 0; //mystring[64]=0:
//////////
_int64 result,partResult;

for( int n=0; n<=63; n++)
{ partResult =( mystring[63-n]*(int)pow(2,(63-n) ) );
result =result+partResult;
}
//////////// Format to display result
CString strResult;
strResult.Format("%16I64d",result);
GetDlgItem(IDC_MYRESULT)->SetWindowText(strResult);

Re: Conversion to LONGLONG

fardak13-Apr-05 22:50

fardak

13-Apr-05 22:50

(Sorry I don't know how to call back the thread to edit it )
The result should be:(if i'm not mistaking)
184 467 440 737 095 516 15
which I am not getting.
Is my formatting wrong ?

directx

shumyla198312-Apr-05 21:36

shumyla1983

12-Apr-05 21:36

hi i need some help to find the library QuartzTypeLib.dll. and from where can i get this library.plz reply me soon.

best regards.

shumyla

Re: directx

22491712-Apr-05 22:04

224917

12-Apr-05 22:04

You can create it by using TlbImp.exe An msdn example is here[^]

suhredayan
There is no spoon.

double to char conversion vc++

nehathoma12-Apr-05 21:04

nehathoma

12-Apr-05 21:04

anybody plz tell me how to do double to char conversion in vc++?

Re: double to char conversion vc++

Cedric Moonen12-Apr-05 21:08

Cedric Moonen

12-Apr-05 21:08

You mean converting a double into a string (char*) ? You can use sprintf function like that:

char szString[255];<br />
double Value = 0.521;<br />
sprintf(szString,"%.3f",Value);

Take a look at the doc to see how to play on each parameters (for example the '.3' part above is for telling the function it has to print 3 digits after the floating point).

Hope this helps

Re: double to char conversion vc++

Anonymous12-Apr-05 21:15

Anonymous

12-Apr-05 21:15

Check this article .....it will help you .

www.codeproject.com/cpp/data_conversions.asp

Cheers .

Re: double to char conversion vc++

John R. Shaw12-Apr-05 21:36

John R. Shaw

12-Apr-05 21:36

Well, the simpilist way is to use the C-languages sprintf function:

char szBuf[512]; // assumes: number of digits (+ '\0') is < 512
sprintf(szBuf,"%f",double_value);

There are other ways to do the convertion in VC++, so explore and find them (some of them are safer, but not portable).

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: double to char conversion vc++

jhwurmbach12-Apr-05 23:43

jhwurmbach

12-Apr-05 23:43

The C++ way (as opposed to the C way) of doing this conversion is using a stringstream.
To increase convenience, you can use boosts lexical cast[^].
Boost[^] is a page created by the inventors of the STL to hold all sorts of code that augments the STL. Many little (and not so little) helpers for day to day stuff are there.

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Speed VStudio vs .NET

doctorpi12-Apr-05 21:03

doctorpi

12-Apr-05 21:03

Hi guys
Somebody told me that the app generated with .NET are still slower than the app generated with VStudio (app that need speed of course, with millions of calcultaions).
Is this true or not? Is there a comparison table somewhere?
Best Regards
Doc

Re: Speed VStudio vs .NET

4apai12-Apr-05 21:50

4apai

12-Apr-05 21:50

as i know. .net got its own interpretor machine - to translate c++, C#, vb code in proper way. therefore its initially run it and then interprete code there. that's the way it running slower.
the explanaition could be not exact.

4apai
There're no impossible tasks. There're tasks that required infinite period of execution time.

Re: Speed VStudio vs .NET

jhwurmbach12-Apr-05 23:48

jhwurmbach

12-Apr-05 23:48

Visual Studio is also used to write .NET programs, so your dichotomy is misplaced.
If you think of C++ vs. C# (or any other .NET language, for that matter), you may notice a decrease or a small increase in performance, depending on the exact nature of your algorithm.
In fact, writing a slow C++-Program is very easy, writing a fast, fault tolerant one is remarkably complex.

Re: Speed VStudio vs .NET

Adi Narayana Vemuru13-Apr-05 1:17

Adi Narayana Vemuru

13-Apr-05 1:17

The Theory proposed is not 100% right. But that's true when the any piece of code is running for first time during execution of application in Dotnet comparing to C++ application(VS 6.0 compiler).

Reason is Dotnet compiler generates MSIL, which will be compiled to Native code by JIT on first execution of each MSIL piece of code. Once it's compiled to Native code it's similar to any C++ program compiled with VS 6.0 compiler.

But when comes to application specific, the performance definitely depends on the algorithms you are implementing.

hope the above suffice for ur doubt

Regards,
Adi

CopyFile + ERROR_FILE_EXISTS

peterchen12-Apr-05 20:48

peterchen

12-Apr-05 20:48

I have a case of CopyFile(src, dst, false) returning ERROR_FILE_EXISTS (customer PC, no more information). ('false' supposedly indicates <c>not to fail if the destination already exists)

I searched the KB, and didn't find any description of that. Did someone encounter the same behavior?

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Re: CopyFile + ERROR_FILE_EXISTS

GDavy12-Apr-05 21:04

GDavy

12-Apr-05 21:04

Security access perhaps?. No write access or smthng?

i need Sample for accessing Webservices in VC++

Killer312-Apr-05 20:15

Killer3

12-Apr-05 20:15

i need Sample for accessing Webservices in VC++

for thendral

Re: i need Sample for accessing Webservices in VC++

22491712-Apr-05 20:20

224917

12-Apr-05 20:20

http://www.codeproject.com/webservices/SoapClient_CPP.asp[^]

suhredayan
There is no spoon.

Retrieval of HDD Serial Number using C++/VC++

jpatexor12-Apr-05 19:59

jpatexor

12-Apr-05 19:59

Hi Developers,

I have a problem. I want to retrieve the serial number of my hard disk either using C++/Vc++.

Actually i am doing a Java project where i want this functionality unfortunately Java does not support that feature as far as my knowledge is concerned.

So if i get a method either using C++/VC++ i can use JNI to get the functionality into Java.

Thanks in advance for ur help, which u r going to give me Smile | :)

Sincerely

Jayaprakash

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