请你用c++编写 wsaeventselect i/o模型实现一个联网多人在线五子棋程序

以下是一个使用c++编写的wsaeventselect i/o模型实现的联网多人在线五子棋程序的基本代码框架，仅供参考：

#include <iostream>
#include <winsock2.h>
#include <ws2tcpip.h>
#pragma comment(lib, "ws2_32.lib")

#define MAX_CLIENTS 10
#define PORT 8080

SOCKET clients[MAX_CLIENTS];
WSAEVENT events[MAX_CLIENTS];
int num_clients = 0;
char buffer[1024];

void process_read_event(int idx);
void process_write_event(int idx);
void broadcast_game_state();

int main() {
    // 初始化Winsock库
    WSADATA wsa_data;
    int result = WSAStartup(MAKEWORD(2, 2), &wsa_data);
    if (result != 0) {
        std::cerr << "WSAStartup failed: " << result << std::endl;
        return 1;
    }

    // 创建Socket对象
    SOCKET server_socket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (server_socket == INVALID_SOCKET) {
        std::cerr << "Failed to create socket: " << WSAGetLastError() << std::endl;
        WSACleanup();
        return 1;
    }

    // 绑定IP地址和端口号
    sockaddr_in server_addr;
    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = INADDR_ANY;
    server_addr.sin_port = htons(PORT);
    result = bind(server_socket, (sockaddr*)&server_addr, sizeof(server_addr));
    if (result == SOCKET_ERROR) {
        std::cerr << "Failed to bind socket: " << WSAGetLastError() << std::endl;
        closesocket(server_socket);
        WSACleanup();
        return 1;
    }

    // 开始监听连接请求
    result = listen(server_socket, SOMAXCONN);
    if (result == SOCKET_ERROR) {
        std::cerr << "Failed to listen on socket: " << WSAGetLastError() << std::endl;
        closesocket(server_socket);
        WSACleanup();
        return 1;
    }

    // 创建事件对象并关联到Socket
    WSAEVENT accept_event = WSACreateEvent();
    WSAEventSelect(server_socket, accept_event, FD_ACCEPT);

    // 主循环
    while (true) {
        // 等待事件的发生
        DWORD num_events = WSAWaitForMultipleEvents(num_clients + 1, events, FALSE, WSA_INFINITE, FALSE);
        if (num_events == WSA_WAIT_FAILED) {
            std::cerr << "WSAWaitForMultipleEvents failed: " << WSAGetLastError() << std::endl;
            break;
        }

        // 处理事件
        for (int i = 0; i < num_clients; i++) {
            if (events[i] != WSA_INVALID_EVENT && WSAWaitForMultipleEvents(1, &events[i], TRUE, 0, FALSE) == WSA_WAIT_EVENT_0) {
                WSANETWORKEVENTS net_events;
                WSAEnumNetworkEvents(clients[i], events[i], &net_events);
                if (net_events.lNetworkEvents & FD_READ) {
                    process_read_event(i);
                }
                if (net_events.lNetworkEvents & FD_WRITE) {
                    process_write_event(i);
                }
                if (net_events.lNetworkEvents & FD_CLOSE) {
                    closesocket(clients[i]);
                    WSACloseEvent(events[i]);
                    for (int j = i; j < num_clients - 1; j++) {
                        clients[j] = clients[j + 1];
                        events[j] = events[j + 1];
                    }
                    num_clients--;
                }
            }
        }

        if (num_events == WSA_WAIT_EVENT_0 + num_clients) {
            // 处理新的连接请求
            sockaddr_in client_addr;
            int addr_len = sizeof(client_addr);
            SOCKET client_socket = accept(server_socket, (sockaddr*)&client_addr, &addr_len);
            if (client_socket == INVALID_SOCKET) {
                std::cerr << "Failed to accept connection: " << WSAGetLastError() << std::endl;
            } else if (num_clients == MAX_CLIENTS) {
                std::cerr << "Max number of clients reached, connection refused" << std::endl;
                closesocket(client_socket);
            } else {
                clients[num_clients] = client_socket;
                events[num_clients] = WSACreateEvent();
                WSAEventSelect(client_socket, events[num_clients], FD_READ | FD_WRITE | FD_CLOSE);
                num_clients++;
            }
        }

        // 广播游戏状态
        broadcast_game_state();
    }

    // 清理资源
    closesocket(server_socket);
    for (int i = 0; i < num_clients; i++) {
        closesocket(clients[i]);
        WSACloseEvent(events[i]);
    }
    WSACleanup();

    return 0;
}

void process_read_event(int idx) {
    // 读取客户端发送的数据
    int num_bytes = recv(clients[idx], buffer, sizeof(buffer), 0);
    if (num_bytes == SOCKET_ERROR) {
        std::cerr << "Failed to read data from client: " << WSAGetLastError() << std::endl;
        return;
    }

    // 解析数据并更新游戏状态
    // TODO: 解析数据并更新游戏状态
}

void process_write_event(int idx) {
    // 发送当前游戏状态给客户端
    // TODO: 发送当前游戏状态给客户端
}

void broadcast_game_state() {
    // 广播当前游戏状态给所有客户端
    // TODO: 广播当前游戏状态给所有客户端
}

需要注意的是，该代码仅为基本框架，具体实现还需要根据具体需求进行完善和修改。同时，还需要注意多线程编程的相关问题，如线程同步和资源竞争等。