I had a window on which i am drawing a bitmap , and am dragging the window basically the bitmap. My code is capturing the bitmap from one location and the problem is when i drag it the bitmap keeps changing to the bitmap to the place where my mouse is moving.  Suppose i have 2 images drawn on screen . when i start dragging from the place near to image 1 and keep on moving bitmap also changes, i am not getting it how is it changing , shouldn't bitmap should remain same ? Why is it changing if the position of my window is changing , i have checked the coordinates are same they are not changing which i have passed in BitBlit function

in Onpaint() i have used this code -
hBitmap = ::CreateCompatibleBitmap(m_panel_hdc, 600,600);
paint.BitBlt(100,100,585,600, window_dc,599,77,dwRop);
::SelectObject(m_drag_wnd_compatible_dc, hBmpOld);


OnMouseMove()
I am calling MoveWindow() API for moving the window.

And also when i try to move the window fastly with mouse the traces of bitmap of getting dragged are left behind and take time to be back in normal position.
Any help would be really appreciated.

I'm trying to set up a uncaught exception handler at process level in a
> vc++ program
> set_terminate() and set_unexpected()
> My program is multi-threaded.  I'm already able to set up my handlers in
> the main thread and catch all the exceptions thrown by the main thread.
> What I'm not able to do is to trap all the uncaught exceptions thrown by
> non-main threads.

Can you please give me sample program inside the Winmain() how to call the set_terminate() and set_unexpected()  functions and how to declare outside of the Winmain().

Hey!

I am developing an application using JetBrains CLion 2018.2.4 with cmake 3.12.2 and Visual Studio 2017 compiler.
Let me set up things first.

Here is the base class:

class Header
{
public:
   enum MessageType
   {
      Message = 100,
      Command = 101,
      InvalidMessage = 102
   };

   Header();
   Header(Header::MessageType messageType);
   virtual ~Header() = default;

   Header::MessageType GetMessageType() const;
private:
   Header::MessageType m_messageType;
};

Header::Header() :
   m_messageType(Header::MessageType::InvalidMessage)
{
}

Header::Header(Header::MessageType messageType) :
   m_messageType(messageType)
{
}

Header::MessageType Header::GetMessageType() const
{
   return m_messageType;
}

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Here is the derived class:

class Message : public Header
{
public:
   Message();
   ~Message() = default;

   void SetMessage(std::string message);
   std::string GetMessage() const&;

private:
   std::string m_message;
};

Message::Message() :
   Header(Header::MessageType::Message),
   m_message("")
{
}

void Message::SetMessage(std::string message)
{
   m_message = message;
}

std::string Message::GetMessage() const&
{
   return m_message;
}

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Here is how I'm acessing the function GetMessage();

int main()
{
   Reader reader;

   auto basePtr = reader.ReadAll(message);
   auto derivedPtr = std::dynamic_pointer_cast<communication::Message>(basePtr);
   std::cout << "read: " << derivedPtr->GetMessageType() << ";" << derivedPtr->GetMessage();
}

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When I try to execute GetMessage() like up above, I get the error below:

Server.cpp.obj : error LNK2019: unresolved external symbol "public: class std::basic_string<char,struct std::char_traits<char>,class std::allocator<char> > __thiscall communication::Message::GetMessageA(void)const & " (?GetMessageA@Message@communication@@QGBE?AV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@XZ) referenced in function _main
Server.exe : fatal error LNK1120: 1 unresolved externals

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It has to do with the function GetMessage() but I'm failing to see what is wrong. If I remove that call, everything compile fine.
Also, I do the exact same call in other class and it is working fine.
Help is needed!!!

I'm trying to understand the structure of the open file table. During this search I'm reading things that look like (for me) they are in contrast with each other.

In a system there is a:

File descriptor table:
This table is located in user space and is associated with a certain process (per-process).

Open file table:
This table is located in kernel space and is associated with all processes (process-wide).

Entries in the file descriptor table point to the open file table. This all is clear. Now let's go to the structure of these tables. For example, see: https://elixir.bootlin.com/linux/v3.18/source/include/linux/fdtable.h#L24

struct fdtable {
        [...]
};

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And:

/*
 * Open file table structure
 */
struct files_struct {
        [...]
};

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Also this is clear. But now see for example: http://www.andrew.cmu.edu/user/gkesden/ucsd/classes/sp17/cse291-a/applications/ln/lecture5.html

Per Process File Information

struct files_struct { /* kept within task_struct (PCB) */
        [...]
};

Here they are talking about files_struct when it's about "per process file information". I don't understand this, because the open file table is process-wide. This is for example what they are saying:

The count variable tracks the number of files the process has open

But imagine ... two different processes point to the same entry in the open file table. I think …

Hello,
There are 2 COM interfaces whose implementation is proprietary

I need to create a COM object (either in C++ or C# com server) and invoke it to use their functions from a c# client console application

How should i approach the task?

Thank you

Hi Team,
I want to design the global try/catch block inside the winmain() function and my application already do have __try and __except blocks (SEH mechanism).
So i want to add global try/catch block for that it will help us to catch the unhandle exceptions.
Please find the below code and give your suggestion where can i add the global try/catch block inside the winmain(..).

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int showCmd)
{
    MSG msg = { 0 };

    __try
    {
        HACCEL      hAccel;
        WNDCLASSEX  wcl = { 0 };
        char        errorText[1024];

        g_hInst = hInstance;

        /* register main window class */
        if (!RegisterClassEx(&wcl))
            return TPG_GenMessageDialog(NULL, "Error registering main window class.",
            APP_TITLE " Win32 Error", MB_ICONSTOP, SS_MSGDLGTIMEOUT);
        /* read ini file */
        /* create main window  code*/
        /* show window - showCmd overrides saved state if not SW_SHOWNORMAL */

        hAccel = LoadAccelerators(hInstance, MAKEINTRESOURCE(IDR_ACCELERATORS));  /* ignore error */

        /* start it up! */
        if (!Startup(errorText, sizeof errorText))
        {
            Log(mtIgnore, SS_NOMCPMSG, TPG_LOGLEVEL_ERROR, errorText);
            return TPG_GenMessageDialog(g_hWnd, errorText, APP_TITLE " Startup Error", MB_ICONSTOP,
                SS_MSGDLGTIMEOUT);
        }
        while (GetMessage(&msg, NULL, 0, 0) > 0)
        {
…

I have a code in C++ which needs to be converted into VBA.

//#include <Rcpp.h>
//#include <math.h>
//#include <iostream.h>

using namespace Rcpp;
double qnormal_x,qnormal_y,qnormal_z;
double expq(double q, double w){
if(q==1.0){
return(exp(w));
}
else{
return (expl(log(1.0+(1.0-q)*w)/(1.0-q)));
}
}
double lnq(double q, double w){
if(q==1.0){
return(log(w));
}
else{
return ((exp(log(w)*(1.0-q))-1.0)/(1.0-q));
}
}
void setseed_qnormal(double v0, double z0){
qnormal_x = sqrt(1-v0*v0);
qnormal_y = v0;
qnormal_z = z0;
}
double Q8(double w, double v){
return(8*w*v*(((16.0*w*w-24.0)*w*w+10.0)*w*w-1.0));
}
double P8(double w){
return((((128.0*w*w-256.0)*w*w+160.0)*w*w-32.0)*w*w+1.0);
}
double f(double z){
return(1.0-fabs(1.0-1.99999*z));
}
void qnormal(double q){
double qq;
qnormal_y = Q8(qnormal_x,qnormal_y);
qnormal_x = P8(qnormal_x);
qq = (q+1.0)/(3.0-q);
qnormal_z = f(expq(qq,-qnormal_z*qnormal_z*0.5));
qnormal_z = sqrt(-2.0*lnq(qq,qnormal_z));
}  

// [[Rcpp::export]]
NumericVector Chaotic(int n,double q,double v0, double z0){
  double eta;
  double xi;
  NumericVector ux(n);
setseed_qnormal(v0,z0);
for(int i=0;i<n;i++){
qnormal(q);
xi = qnormal_x*qnormal_z;
eta = qnormal_y*qnormal_z;
ux[i]= xi;
}
return ux;
}

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Question is related to C++ STL list::sort(Compare) where Compare is now a template.

I am looking for the correct syntax to override the list::sort(Compare) definition to work with list<pair<int, T> > definition.

//-The Compare Function

template<typename W>
bool weightsort(const pair<int, W> &node1, const pair<int, W> &node2)
{
    return (node1.second <= node2.second);
}


//- Abbreviated class definition containing  STL list definition and call to sort

template<typename T>
class Graph {
    ...
    vector<T> shortest_reach(int startId, T sigWeight) {
        ...
        list<pair<int, T> >                                       frontier;   //-Nodes currently on the Queue to be Explored.
        typename list<pair<int, T> >::iterator      fit;
        ...
            frontier.sort(weightsort);
        ...
    }
    ....
};


$ c++ program.cpp

error: no matching member function for call to 'sort'
            frontier.sort(weightsort);
            ~~~~~~~~~^~~~

usr/include/c++/v1/list:1059:14: note: candidate template ignored:
      couldn't infer template argument '_Comp'
        void sort(_Comp __comp);
             ^
/usr/include/c++/v1/list:1056:10: note: candidate function not viable:
      requires 0 arguments, but 1 was provided
    void sort();
         ^

could you anyone explain how we will convert c++ code to PHP ?

Link to the problem:

The code works fine on my own system, but while submitting shows wrong answer?

 

   #include <stdio.h>
    void main()
    {
    	int t, n, count;
    	scanf("%d", &t);
    	while(t--)
    	{
    		count=0;
    		scanf("\n%d",&n);
    		while(n>0){
    		if(n%10==4)
    		{
    			count++;
    		}
    		n=n/10;
    	}
    	printf("\n%d", count);
    	}
    }

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What is the issue with the above code and how would you fix it?
indentation does not matter in this code, ":=" denotes the substitution, and "=" is the equal comparator.

========
Initial state of an array "a":

[[2, NULL, 2, NULL],
 [2, NULL, 2, NULL],
 [NULL, NULL, NULL, NULL],
 [NULL, NULL, NULL, NULL]]

========
Main function:

FUNCTION foo()
    FOR y := 0 to 3
        FOR x := 0 to 3
            IF a[x+1][y] != NULL
                IF a[x+1][y] = a[x][y]
                    a[x][y] := a[x][y]*2
                    a[x+1][y] := NULL
                END IF
                IF a[x][y] = NULL
                    a[x][y] := a[x+1][y]
                    a[x+1][y] := NULL
                END IF
            END IF
        END FOR
   END FOR
END FUNCTION


What does the foo function do?

How could you make foo more generic? Can we have three possible generalization directions ?

Hi All

I have a query regarding  memory related issue I am getting in one of my web service.
I have made a service using c# which is calling C++ third party dll. While running the service I am getting below error.

"Memory gates checking failed because the free memory is less than 1%."

After going through in deep, i found that there is some memory leak issue exist in the dll.
do we have any way by which-

1. we can release the used memory by c++ dll in c#?
2. Within service or using IIS, can we put a check by which how much free memory, service is using we will get to know and then and there can do the forceful recycle?

any idea will help.

Thanks

Hello , i've the following routine :

int Asio_Send_Pck(int iSendt,int Lsocket,char * Lbuff,int Len)

{

    LSession* iTempLSession = reinterpret_cast<LSession*>(Lsocket);

    boost::asio::async_write(iTempLSession->socket() ,

                              boost::asio::buffer(Lbuff, Len),

                              boost::bind(&LSession::handle_write, 

                              iTempLSession,

                              boost::asio::placeholders::error,

                              iTempLSession->data,

                              iSendt

                              ));

    return 0;

};

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But i always get an Invalid Arguments .

Here's my Lsession class :

class LSession
{
public:
  int readlen;
  int userdata;
  int deadtime;
  enum { max_length = 1024};
  char data_[max_length];
  
   LSession(boost::asio::io_service& io_service)
        : deadtime(0), socket_(io_service)
    {
        readlen = 0;
        userdata = 0;
    }

  ~LSession()
  {
	  socket_.close();
  }

  tcp::socket& socket()
  {
    return socket_;
  }

  void start()
  {	  
    socket_.async_read_some(boost::asio::buffer(data_, max_length),
        boost::bind(&LSession::handle_read, this,
          boost::asio::placeholders::error,
          boost::asio::placeholders::bytes_transferred));
  }

  void handle_read(const boost::system::error_code& error,
      size_t bytes_transferred)
  { 
    if (!error)
    {
	
	  try
	  {
	  if(Callback_readdata!= NULL)
	  

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…