C / C++ / MFC

KarstenK6-Jul-09 2:48

KarstenK

6-Jul-09 2:48

thats a real basic homework:
1. find the 2 blank positions
2. extract the chars in between

it is no question it is a sign thats you arent engaged enough for writing code Mad | :mad:

Press F1 for help or google it.
Greetings from Germany

TheGreatAndPowerfulOz6-Jul-09 10:51

TheGreatAndPowerfulOz

6-Jul-09 10:51

Tiyani Miyambo wrote:
"Sam james thomas"

strtok(strtok("Sam james thomas", " "), null);

David Crow7-Jul-09 3:34

David Crow

7-Jul-09 3:34

ahmed zahmed wrote:
strtok(strtok("Sam james thomas", " "), null);

Maybe you meant this as a joke. Otherwise, you can't seriously think it would produce the desired result.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

CreateTimerQueue() - questions about how it works? [modified]

TheGreatAndPowerfulOz16-Jul-09 8:30

TheGreatAndPowerfulOz

16-Jul-09 8:30

you are correct, it won't produce the desired result. what was i thinking?

strtok("Sam james thomas", " ");
strtok(null, " ");

Souldrift5-Jul-09 23:40

Souldrift

5-Jul-09 23:40

I have a thread going on a little way down, about threads and timing. Now a question came up that I felt should go into a different thread.
I have the following code piece

HANDLE hTimerQueue = CreateTimerQueue();
HANDLE hTimer;
count = 0;
CreateTimerQueueTimer(&hTimer, hTimerQueue, (WAITORTIMERCALLBACK)&DoSendHere, 0 , 20, 0, WT_EXECUTEINTIMERTHREAD);

QueryPerformanceCounter(&liStart);
::SleepEx(60, TRUE);
//DeleteTimerQueueTimer( hTimerQueue, hTimer, NULL );
LONG lCount = count;
QueryPerformanceFrequency(&liFreq);
			
m_pLogger->Out( Logger::DEBUG, "RTPEngine: Time     = %f.\n", double(liEnd.QuadPart-liStart.QuadPart) / double(liFreq.QuadPart) );
m_pLogger->Out( Logger::DEBUG, "RTPEngine: Count    = %d.\n", lCount );
//DeleteTimerQueueTimer( hTimerQueue, hTimer, NULL );

The liEnd variable is filled in the callback function.
Several issues:
1. Like it is the callback func is called once (like intended) but the output gives a time of appx. 30ms, not 20ms. Actually the time is never the time I set up.
2. Why does it crash if I call DeleteTimerQueueTimer( hTimerQueue, hTimer, NULL ); after the output?

The output is this

RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.030410.
RTPEngine: Count    = 1.
RTPEngine: Sending data package with size 480 (excluding header).
RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.030192.
RTPEngine: Count    = 1.
RTPEngine: Sending data package with size 480 (excluding header).
RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.030377.
RTPEngine: Count    = 1.

This is the output for a 9ms dueTime:

RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.016252.
RTPEngine: Count    = 1.
RTPEngine: Sending data package with size 480 (excluding header).
RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.014759.
RTPEngine: Count    = 1.
RTPEngine: Sending data package with size 480 (excluding header).
RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.014178.
RTPEngine: Count    = 1.
RTPEngine: Sending data package with size 480 (excluding header).
RTPEngine: Timer callback activated.
RTPEngine: Time     = 0.014759.
RTPEngine: Count    = 1.

Souldrift

modified on Monday, July 6, 2009 5:53 AM

Re: CreateTimerQueue() - questions about how it works?

Stuart Dootson6-Jul-09 0:12

Stuart Dootson

6-Jul-09 0:12

I can't reproduce your results - I always see the timer triggering roughly (within around 2-300 microseconds) when expected.

Note that in my initial post about timer queue timers I posted the wrong callback function signature - that could have caused crashes, as there was an extra formal parameter - sorry about that.

You may find it useful to investigate the different values in the Flags parameter of CreateTimerQueueTimer - the callback doesn't have to execute in the same thread as the timer.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

Re: CreateTimerQueue() - questions about how it works?

Souldrift6-Jul-09 1:36

Souldrift

6-Jul-09 1:36

Well, I made a small adaption to your code like this (some output and another timing behaviour)

#include <windows.h>
#include <tchar.h>
#include <iostream>

LONG count;
LARGE_INTEGER liStart, liEnd, liFreq;

VOID CALLBACK DoSendHere(__in_opt  LPVOID lpArgToCompletionRoutine,
                         __in      DWORD dwTimerLowValue,
                         __in      DWORD dwTimerHighValue)
{
   QueryPerformanceCounter(&liEnd);
   
   count++;
   std::cout << "Time = " << double(liEnd.QuadPart-liStart.QuadPart) / double(liFreq.QuadPart) << std::endl;
}

void SendLoop()
{
   HANDLE hTimerQueue = CreateTimerQueue();
   HANDLE hTimer;
   count = 0;
   QueryPerformanceFrequency(&liFreq);
   CreateTimerQueueTimer(&hTimer, hTimerQueue, (WAITORTIMERCALLBACK)&DoSendHere, 0 , 0, 9, WT_EXECUTEINTIMERTHREAD);
   QueryPerformanceCounter(&liStart);

   ::SleepEx(65, TRUE);
   LONG lCount = count;
   DeleteTimerQueueTimer(hTimerQueue, hTimer, 0);
   std::cout << "Time = " << double(liEnd.QuadPart-liStart.QuadPart) / double(liFreq.QuadPart) << std::endl;
   std::cout << "count = " << lCount << std::endl;
}

int _tmain(int argc, _TCHAR* argv[])
{
   SendLoop();
   getchar();
   return 0;
}

The result shows the same 15ms jumps I had before. Maybe there´s just no way around. I guess, I think some more and then we might have to settle for a different approach.

Thanks once again for ideas and brainstorming.

Souldrift

How to read this type of text file in C/C++?

Member 63711455-Jul-09 22:39

Member 6371145

5-Jul-09 22:39

Hej Everyone,

I opened MS word file in NOTEPAD and saved it as text file so that i can read the saved file using C/C++ streams. Below i have given image of MS word file opened in NOTEPAD and then i tried to read it using C/C++ streams but my programs reads the first few characters and then terminates. Why can't i read all these characters?

http://i41.tinypic.com/nybvih.jpg[^]

Any help in this regard will be appreciated. Smile | :)

Thanks

Cedric Moonen5-Jul-09 22:43

Cedric Moonen

5-Jul-09 22:43

Post some relevant code snippet otherwise we can't guess what you are doing wrong.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Member 63711455-Jul-09 22:49

Member 6371145

5-Jul-09 22:49

int main()
{
ifstream file("test.txt");
char ch;
if (file.is_open())
{
while ( !file.eof() )
{
file >> ch;
cout << ch;
}
}

getchar();
return (0);
}

-

This program just read the first few (5 to 6) characters of the MS word file saved as text file. How to read the remaining characters?

Cedric Moonen5-Jul-09 23:21

Cedric Moonen

5-Jul-09 23:21

Are you aware that the file contains binary data ? What are you trying to achieve exactly ? Trying to output to the screen a binary file is probably not a good idea...

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Member 63711455-Jul-09 23:57

Member 6371145

5-Jul-09 23:57

@Cédric Moonen

-

Thanks. Let me try it using binary. Smile | :)

-

Thanks everyone.

CPallini5-Jul-09 23:31

CPallini

5-Jul-09 23:31

Member 6371145 wrote:
I opened MS word file in NOTEPAD and saved it as text file so that i can read the saved file using C/C++ streams.

That makes no sense:

Changing the file extension won't change the (binary) content.
C/C++ can (of course) read binary content of files.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

[Message Deleted] [modified]

Adam Roderick J6-Jul-09 5:53

Adam Roderick J

6-Jul-09 5:53

Did you tried with binary file mode?
MS word is actually writes in binary mode starts with MS word File header.

Database path

MsmVc5-Jul-09 22:28

MsmVc

5-Jul-09 22:28

Hi Expert

how to get mysql database path throigh code?

Re: Database path

Stuart Dootson6-Jul-09 0:13

Stuart Dootson

6-Jul-09 0:13

Path to what part of mysql?

I'm pretty sure that 'path to the database' isn't meaningful - remember that the database can be on a separate machine, on a filesystem you have no visibility of.

Java, Basic, who cares - it's all a bunch of tree-hugging hippy cr*p

rajapp5-Jul-09 21:24

rajapp

5-Jul-09 21:24

how to Add button inside view class in MFC

modified on Wednesday, July 15, 2009 3:49 AM

Hamid_RT5-Jul-09 22:18

Hamid_RT

5-Jul-09 22:18

Do you need to Ownerdraw for your button?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

rajapp6-Jul-09 0:30

rajapp

6-Jul-09 0:30

i will explain wht i did. i uploaded a bit map and inthat bit map i draw a rectangle in view OnDraw function.

pDC->Rectangle(x, y, x1, y1);

now wht i want is that whn i click on the rectangle i want another window to b opened.

Hamid_RT6-Jul-09 0:42

Hamid_RT

6-Jul-09 0:42

You can use of CreateWindow/ShowWindow or DoModal for show other dialogs.

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

chandu0046-Jul-09 1:56

chandu004

6-Jul-09 1:56

sounds simple,
just take the onclick event on the view, it will give you, the point,(x,y), clicked.
then use ptinrect(...) function to verify, weather user has clicked on the desired rectangle or not.
hope this should be clear for you.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.