C / C++ / MFC Discussion Boards

bzz073-Aug-09 1:39

3-Aug-09 1:39

First of all, sorry for my bad english.. I need help with my c code..

void Calculate()
{	
	for (int i=0;i<1;i++)
	{
		for(int j=0;j<3;j++)
		{
			
			c[i][j] = x[i][j] * w[i][j];
			sum1 += c[i][j];
		
			printf("Output[%d]: %.1f ",i+1,c[i][j]);
		}
		printf("\n");
		printf("Sum: %.1f\n",sum1);
	}
	printf("\n");

	for (int i=1;i<2;i++)
	{
		for(int j=0;j<3;j++)
		{
			
			c[i][j] = x[i][j] * w[i][j];
			sum2 += c[i][j];
		
			printf("Output[%d]: %.1f ",i+1,c[i][j]);
		}
		printf("\n");
		printf("Sum: %.1f\n",sum2);
	}
	printf("\n");

	for (int i=2;i<3;i++)
	{
		for(int j=0;j<3;j++)
		{
			
			c[i][j] = x[i][j] * w[i][j];
			sum3 += c[i][j];
		
			printf("Output[%d]: %.1f ",i+1,c[i][j]);
		}
		printf("\n");
		printf("Sum: %.1f\n",sum3);
	}
	printf("\n");

	for (int i=3;i<4;i++)
	{
		for(int j=0;j<3;j++)
		{
			
			c[i][j] = x[i][j] * w[i][j];
			sum4 += c[i][j];
		
			printf("Output[%d]: %.1f ",i+1,c[i][j]);
		}
		printf("\n");
		printf("Sum: %.1f\n",sum4);
	}
	printf("\n");
}

how can i make this code become simple? its a sum of each row.. it has 4 row, sum1 is the sum for the first row only.. and sum2 is the sum for the second row only and so on.. please help me on how to make this code simpler cause i think its redundant.. thanx..

Re: I need help with my code

Luc Pattyn3-Aug-09 2:17

Luc Pattyn

3-Aug-09 2:17

Hi,

not sure since you didn't show all declarations, but this should come close:

int sums[4];

for (int i=0; i<4; i++) {
    sums[i]=0;
    for(int j=0; j<3; j++) {
        c[i][j] = x[i][j] * w[i][j];
        sums[i] += c[i][j];
        printf("Output[%d]: %.1f ",i+1,c[i][j]);
    }
    printf("\n");
    printf("Sum: %.1f\n",sums[i]);
}

Luc Pattyn [Forum Guidelines] [My Articles]

The quality and detail of your question reflects on the effectiveness of the help you are likely to get.
Show formatted code inside PRE tags, and give clear symptoms when describing a problem.

Re: I need help with my code

bzz073-Aug-09 2:32

bzz07

3-Aug-09 2:32

thanx Luc Pattyn for ur help..

SetProxy function throwing exception

Ash_VCPP3-Aug-09 1:39

Ash_VCPP

3-Aug-09 1:39

Hi all,

i am using this smart pointer to send http request to server:-

IServerXMLHTTPRequest2Ptr pIXMLHTTPRequest = NULL;

Then through this I called the method setproxy where second parameter is having some ip address:-

pIXMLHTTPRequest->setProxy(SXH_PROXY_SET_DIRECT,varProxyName,L"");

but this is causing exception and getlasterror() is returning "3".Please rovide some suggestions.

Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....

Re: SetProxy function throwing exception

Bacon Ultimate Cheeseburger3-Aug-09 12:55

Bacon Ultimate Cheeseburger

3-Aug-09 12:55

When you call setProxy() have you already acquired a pointer to an object implementing the IServerXMLHTTPRequest2 interface? Have you properly set up varProxyName?

1300 calories of pure beef goodness can't be wrong!

Re: SetProxy function throwing exception

Ash_VCPP3-Aug-09 20:40

Ash_VCPP

3-Aug-09 20:40

Hi Bacon,

First of all thanks for the reply....i have posted it three times but i get first reply so thanks.

i have used pointer of the interface like this:

IServerXMLHTTPRequest2Ptr pIXMLHTTPRequest = NULL;

and called the method setproxy on the same:-

pIXMLHTTPRequest->setProxy(SXH_PROXY_SET_PROXY,varProxyName);

where varProxyName = SysAllocString(L"114.127.246.36:8080");

when you sya...."have you already acquired a pointer to an object implementing the IServerXMLHTTPRequest2 interface"

so can you explain it in detail.or if you can provide some example for set proxy then it would be really helpful, because i didnt get anything useful in google....

Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....

Re: SetProxy function throwing exception

Bacon Ultimate Cheeseburger3-Aug-09 21:56

Bacon Ultimate Cheeseburger

3-Aug-09 21:56

Ash_VCPP wrote:

IServerXMLHTTPRequest2Ptr pIXMLHTTPRequest = NULL;

When you assign NULL to pIXMLHTTPRequest this tells it to point to nothing. You have to get an object of type IServerXMLHTTPRequest2 and assign it to pIXMLHTTPRequest before you can use it.

Ash_VCPP wrote:
so can you explain it in detail.or if you can provide some example for set proxy then it would be really helpful, because i didnt get anything useful in google....

I haven't used IServerXMLHTTPRequest but it's a COM based object so you'll need to call CoCreateInstance() at some point. If you're not familiar with COM I suggest reading one of the introductions here on CP.

1300 calories of pure beef goodness can't be wrong!

Re: SetProxy function throwing exception

Ash_VCPP3-Aug-09 22:32

Ash_VCPP

3-Aug-09 22:32

hi Bacon,

Please see the code:

HRESULT hresult = CoInitialize(NULL);
IServerXMLHTTPRequest2Ptr pIXMLHTTPRequest = NULL;
hr=pIXMLHTTPRequest.CreateInstance("Msxml2.ServerXMLHTTP.4.0");

that i have done.....please suggest if i am missing something.

Thanks A Ton
Ash_VCPP
walking over water is just knowing where the stones are.....

UINT ThreadProc ( LPVOID param )

susanne13-Aug-09 1:12

susanne1

3-Aug-09 1:12

Hello,

i tried it the way you said, but it did not work , maybe i did something wrong, hier is the code:

void CTestView::ThreadStart(CTestDoc* pDoc, CString strSel)
{
m_Thread_Sel_Start.SetEvent ();

HWND hWnd = GetSafeHwnd();

m_strSelect = strSel;

m_pDoc = pDoc;// i need to access the CTestDoc.cpp, i passed pDoc from the CTestDoc.cpp to the CTestView.cpp
// and then assigend pDoc to m_pDoc which defined in the top of the CTestView.cpp

AfxBeginThread(ThreadProc, this/*hWnd*/, THREAD_PRIORITY_NORMAL);// Hier i passed this to the ThreadProc function
}

UINT ThreadProc
(
LPVOID param
)
{

(CTestView*)param-> // casting to CTestView did not work?

return 0;
}

Re: UINT ThreadProc ( LPVOID param )

CPallini3-Aug-09 1:23

CPallini

3-Aug-09 1:23

I encourage you to read this [^].
Smile | :)

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]

Re: UINT ThreadProc ( LPVOID param )

susanne13-Aug-09 3:24

susanne1

3-Aug-09 3:24

okoay but i have an application crash hier:

#ifdef _DEBUG
void CTestView::AssertValid() const
{
CView::AssertValid(); // application crash
}

#ifndef _WIN32_WCE
void CTestView::Dump(CDumpContext& dc) const
{
CView::Dump(dc);
}
#endif
#endif

Re: UINT ThreadProc ( LPVOID param )

CPallini3-Aug-09 11:46

CPallini

3-Aug-09 11:46

You shouldn't use GUI stuff in worker threads.
Smile | :)

Re: UINT ThreadProc ( LPVOID param )

David Crow3-Aug-09 3:55

David Crow

3-Aug-09 3:55

Is there a question here that I'm failing to see? Confused | :confused:

"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

Re: UINT ThreadProc ( LPVOID param )

susanne13-Aug-09 5:23

susanne1

3-Aug-09 5:23

The question is when i pass (this) instead of (hwnd) to the ThreadProc function i get a crash. The question is above.

Re: UINT ThreadProc ( LPVOID param )

David Crow3-Aug-09 5:26

David Crow

3-Aug-09 5:26

How about formatting your code correctly AND using the <pre> tag?

Re: UINT ThreadProc ( LPVOID param )

Michael Dunn3-Aug-09 9:48

Michael Dunn

3-Aug-09 9:48

-> has higher precedence than a cast, you need parens around the cast so it's evaluated first:

((CTestView*) param)->SomeMethod();

--Mike--
Dunder-Mifflin, this is Pam.

Non Ovelapped Serial I/O

sunny_vc2-Aug-09 23:37

sunny_vc

2-Aug-09 23:37

HI all,
I am working on Non Overlapped serial I/O application.
I have only one thread to receive the data.For send i dont have any thread.
I just call Write file when i need to send .

My problem is, When I have my receive thread wait for an event using WaitCommEvent, it ties up the serial port. Then my sending function can't access the port with WriteFile. I knew waiting for a comm event would block the receiving thread but didn't expect that it would block use of the port.

Any suggestions on how to do non-overlapped communication, where the send fucntion can write while the receive thread waits for a comm event?

Regards,
Sunil Kumar

Re: Non Ovelapped Serial I/O

«_Superman_»2-Aug-09 23:54

«_Superman_»

2-Aug-09 23:54

Try to open the port twice using CreateFile.
Use one handle for writing and another for reading from the port.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Non Ovelapped Serial I/O

sunny_vc3-Aug-09 0:16

sunny_vc

3-Aug-09 0:16

I dont think I can use CreateFile twice.
It is unable to create the second time.The handle is getting some undefined value,
when it is opened the second time.

Regards,
Sunil Kumar

Re: Non Ovelapped Serial I/O

«_Superman_»3-Aug-09 0:21

«_Superman_»

3-Aug-09 0:21

You should be able to open more than once if you specify the FILE_SHARE_READ and FILE_SHARE_WRITE flags.

«_Superman_»
I love work. It gives me something to do between weekends.

Re: Non Ovelapped Serial I/O

CPallini3-Aug-09 0:46

CPallini

3-Aug-09 0:46

«_Superman_» wrote:
You should be able to open more than once if you specify the FILE_SHARE_READ and FILE_SHARE_WRITE flags.

You cannot do that with a communication resource (MSDN [^])

 The CreateFile function can create a handle to a communications resource, such as the serial port COM1. For communications resources, the dwCreationDisposition parameter must be OPEN_EXISTING, the dwShareMode parameter must be zero (exclusive access), and the hTemplateFile parameter must be NULL. Read, write, or read/write access can be specified, and the handle can be opened for overlapped I/O. 

Re: Non Ovelapped Serial I/O

sunny_vc3-Aug-09 0:59

sunny_vc

3-Aug-09 0:59

yeah, I am unable to open it twice even if I mention the shared attributes.
There is no other option for non overlapped I/O, if I have to WriteFile, when
my receive thread wait for an event using WaitCommEvent?

Regards,
Sunil Kumar

Re: Non Ovelapped Serial I/O

CPallini3-Aug-09 1:17

CPallini

3-Aug-09 1:17

As workaround, you may use the same thread for both I/O.
Smile | :)

Re: Non Ovelapped Serial I/O

sunny_vc3-Aug-09 2:05

sunny_vc

3-Aug-09 2:05

Even If I have to send data in the same receive thread,
I am unable to do as WaitCommEvent never returns.
My code block is:

 if (!SetCommMask( pc->hCommn, EV_RXCHAR))
 {
     //Error
 }
 for ( ; ; )
 {
 if (WaitCommEvent(pc->hCommn, &dwCommEvent, NULL))
 {

     do
     {
     if (ReadFile(pc->hCommn, &chRead, 1, &dwRead, NULL))
       {
          // A byte has been read; process it.
           pc->CopyRx(chRead);
       }
       else
       {
          // An error occurred in the ReadFile call.

          break;
       }
     }while(dwRead);
 }
else
   // Error in WaitCommEvent.
   break;
 }

Where can I call my send fucntion in this thread, if I have some data to send.
Please suggest.

Regards,
Sunil Kumar

Re: Non Ovelapped Serial I/O

«_Superman_»3-Aug-09 2:35

«_Superman_»

3-Aug-09 2:35

I was wondering if DuplicateHandle[^] will work.

«_Superman_»
I love work. It gives me something to do between weekends.

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