运行时检查失败＃2 - 围绕变量'线程号'的堆栈已损坏

Question

我的下面的代码给出了一个错误“运行时检查失败＃2 - 堆栈周围的变量'线程号'已损坏。如果我在if语句中添加“break”。我也在代码中突出了这个“突破”。如果我删除了“break”，则错误将被删除。

任何人都可以解释我为什么会发生这种情况？ :(

PS：很抱歉的长码

代码：

DWORD WINAPI ThreadProc(LPVOID param) 
    { 
     int threadNumber= (int)param; 
     int PORT = 8888+threadNumber; //so that each thread bind()s its socket to a different Port number. 
     WSADATA wsa; 

     //Initialise winsock// 
     if (WSAStartup(MAKEWORD(2,2),&wsa) != 0) 
      { 

      //"WinSock Initialization FAILED", 

      } 

     //Create a socket// 

     SOCKET newSocketIdentifier; 
     SOCKADDR_IN newSocket; 

     if((newSocketIdentifier = socket(AF_INET , SOCK_DGRAM , 0)) == INVALID_SOCKET) 
      {     

      //Socket Creation Failed 

      } 
     //Socket Created// 

     //Prepare the sockaddr_in structure// 
     newSocket.sin_family = AF_INET; 
     newSocket.sin_addr.s_addr = INADDR_ANY; 
     newSocket.sin_port = htons(PORT); 

     //Bind// 
     if(bind(newSocketIdentifier ,(struct sockaddr *)&newSocket, sizeof(SOCKADDR_IN)) == SOCKET_ERROR) 
      { 
      //Bind Failed 
      } 

     //Bind Done// char threadNumberBuffer[32] = "Thread Number : "; 
     char buff[12]; 
     itoa(threadNumber,buff,10); 
     strcat(threadNumberBuffer,buff); 
     MessageBox(NULL, 
        threadNumberBuffer, 
        "Thread Created :)", 
        MB_ICONINFORMATION); 


    char data[256]; 
    int bytes, waitRet; 

    WSAEVENT hEvent = WSACreateEvent(); 
    WSANETWORKEVENTS events; 
    WSAEventSelect(newSocketIdentifier, hEvent, FD_READ | FD_WRITE); 

    SOCKADDR_IN clientSocket; 
    int clientSocketLength = sizeof(SOCKADDR_IN); 
    char receiveBuffer[8192]={0}; 
    int recv_len=0; 
    char file[12]="Client"; 
    char threadno[2]; 
    itoa(threadNumber,threadno,10); 
    strcat(threadno,".txt"); 
    strcat(file,threadno); 
    //FILE *fprecv; 
    FILE *fprecv = fopen(TEXT(file),"w+b"); 
    //rewind(fprecv); 
    int receiveCount=0; 

     while(1) 
      { //while(1) starts 
      waitRet = WSAWaitForMultipleEvents(1, &hEvent, FALSE, WSA_INFINITE, FALSE); 
      //WSAResetEvent(hEvent); 
      if(WSAEnumNetworkEvents(newSocketIdentifier,hEvent,&events) == SOCKET_ERROR) 
       { 
        MessageBox(NULL, 
           threadNumberBuffer, 
           "FAILURE", 
           MB_ICONINFORMATION); 
       } 
      else 
       { //else event occurred starts 
        if(events.lNetworkEvents & FD_READ) 
         { //check for network event starts 
         /*MessageBox(NULL, 
            buf, 
            "FD_READ", 
            MB_ICONINFORMATION);*/ 

         if((recv_len = recvfrom(newSocketIdentifier, receiveBuffer, sizeof(receiveBuffer), 0, (struct sockaddr *) &clientSocket, &clientSocketLength)) == SOCKET_ERROR) 
          { 
           MessageBox(NULL, 
              "ERROR", 
              "Could not Receive Data", 
              MB_ICONINFORMATION); 
           exit(EXIT_FAILURE); 
           return FALSE; 
          } 
         receiveCount = receiveCount+1; 
         char display[2000] = "Number of Receives = "; 

         if(memcmp(receiveBuffer,"EXIT",4) == 0) 
          { 
           char receiveCountBuffer[128]; 
           itoa(receiveCount,receiveCountBuffer,10); 
           strcat(display,receiveCountBuffer); 
           MessageBox(NULL, 
              display, 
              threadNumberBuffer, 
              MB_ICONINFORMATION); 
           **break;** //Main Problem is here. if I remove this break statement, the error is removed. Else I get Run-Time Check Failure # 2. 
          } 
        /*MessageBox(NULL, 
           receiveBuffer, 
           "File Read", 
           MB_ICONINFORMATION);*/ 
         else 
         { 
           fprecv= freopen(TEXT(file),"w+b",stdout); 
           if(fwrite(receiveBuffer, 1, recv_len, fprecv)<0) 
            { 
            MessageBox(NULL, 
               "problem while writing file", 
               "Error!", 
               MB_ICONINFORMATION); 

            exit(1); 
            } 
           fclose(fprecv); 
         } 
           /* MessageBox(NULL, 
              "Written", 
              "Success", 
              MB_ICONINFORMATION);*/ 
           //rewind(fprecv); 
        } //check for network event ends 
       } //else event occurred ends 
      } //while(1) ends 

     WSACloseEvent(hEvent); 
     return 0; 
    } 

Answer 1

threadno太小

char threadno[2]; 
itoa(threadNumber,threadno,10); 
strcat(threadno,".txt");   // Buffer overrun! threadno can only fit 2 chars! 
strcat(file,threadno);