Kurs WinApi - serwer nie działa poprawnie

#include <cstdio>
#include <cstdlib>
#include <iostream>
#include <winsock2.h>
#include <windows.h>


void KlientServer();

int main()
{
    WSAData wsaData;
   
    int result = WSAStartup( MAKEWORD( 2, 2 ), & wsaData );
    if( result != NO_ERROR )
    {
        printf( " Initialization error.\n" );
       
    }
   
    SOCKET mainSocket = socket( AF_INET, SOCK_STREAM, IPPROTO_TCP );
    if( mainSocket == INVALID_SOCKET )
    {
        printf( "Error creating socket: %ld\n", WSAGetLastError() );
        WSACleanup();
        return 1;
    }
   
    sockaddr_in service;
    memset( & service, 0, sizeof( service ) );
    service.sin_family = AF_INET;
    service.sin_addr.s_addr = inet_addr( "127.0.0.1" );
    service.sin_port = htons( 27015 );
   
    if( bind( mainSocket,( SOCKADDR * ) & service, sizeof( service ) ) == SOCKET_ERROR )
    {
        printf( "bind() failed.\n" );
        closesocket( mainSocket );
        return 1;
    }
   
    if( listen( mainSocket, 1 ) == SOCKET_ERROR )
         printf( "Error listening on socket.\n" );
   
   
   
    SOCKET acceptSocket = SOCKET_ERROR;
    printf( "Waiting for a client to connect...\n" );
   
    while( acceptSocket == SOCKET_ERROR )
    {
        acceptSocket = accept( mainSocket, NULL, NULL );
    }
   
    printf( "Client connected.\n" );
    mainSocket = acceptSocket;
   
   
   
   
   
   
   
   
   
   
   
   
    return 0;
}