C / C++ / MFC

<br />
FILE *pFile = fopen("1.txt","w");<br />
fseek(pFile,3,SEEK_SET);<br />
fwrite("4",1,strlen("4"),pFile);<br />
fclose(pFile);<br />

void CCommandBox::ProcessEnterKey()
{   
    int dLineLen = LineLength();
    char* szCommand = new char[dLineLen()+1];
    GetLine(0, szCommand);
    szCommand[dLineLen] = '\0';

    E.m_pcpCmdParser->ProcessCommand(szCommand, false);
    SetWindowText("");
    delete[] szCommand;
}

StringHelper temp;
memset ((char *)&serverAddress, 0, sizeof(struct sockaddr_in));

/* Get the host information for the hostname */
serverEnt = gethostbyname (serverHostName);
if ( serverEnt == NULL )
{
   ErrnoMapper enm;
   temp = temp + "Unable to find host name: " + serverHostName;
   temp = temp + " gethostbyname (): errno=" + errno + " " + enm.mapErrno( errno );
   cout << temp << endl;
}

serverAddress.sin_family = AF_INET;
serverAddress.sin_addr.s_addr = ((struct in_addr *)(serverEnt->h_addr))->s_addr;
serverAddress.sin_port = htons(serverPortNumber);

StringHelper temp;

mySocketFd = socket (AF_INET, SOCK_STREAM, 0);

if ( mySocketFd == -1 )
{
   ErrnoMapper enm;
   temp = temp + "Unable to create socket to " + serverHostName;
   temp = temp + " socket(): errno=" + errno + " " + enm.mapErrno( errno );
   cout << temp << endl;
   close(mySocketFd);
}

/* connect to the remote server at the address which was just built into serverAddress */
if (connect(mySocketFd, &serverAddress, sizeof(struct sockaddr_in)) == -1)
{
   ErrnoMapper enm;
   temp = temp + "Unable connect to " + serverHostName + ", port=" + serverPortNumber;
   temp = temp + ",connect(),errno=" + errno + " " + enm.mapErrno( errno );
   cout << temp << enld;
   close(mySocketFd);
   return 0;
}

if ( send(theSocketId, theBuffer, theLength, 0) != theLength)
{
   ErrnoMapper enm;
   StringHelper temp("Unable to send to ");
   temp = temp + serverHostName + ", port number: " + serverPortNumber;
   temp = temp + " send() : errno=" + errno + " " + enm.mapErrno( errno );
   cout << temp << endl;
}