winSock编程实现聊天程序

由于WinSock编程需要用到网络通信和多线程技术，比较复杂，以下是一个简单的WinSock编程实现聊天程序的示例代码：

服务器端：

#include <WinSock2.h>
#include <iostream>
#include <string>
#include <thread>
#include <vector>

using namespace std;

SOCKET serverSocket;
vector<SOCKET> clients;

void handleClient(SOCKET clientSocket) {
    char buf[1024];
    int len;
    while (true) {
        len = recv(clientSocket, buf, sizeof(buf), 0);
        if (len == 0) {
            break;
        }
        buf[len] = '\0';
        cout << "Received: " << buf << endl;
        for (int i = 0; i < clients.size(); i++) {
            if (clients[i] != clientSocket) {
                send(clients[i], buf, len, 0);
            }
        }
    }
    closesocket(clientSocket);
}

int main() {
    WSADATA wsadata;
    WSAStartup(MAKEWORD(2, 2), &wsadata);

    serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    SOCKADDR_IN addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(8888);
    addr.sin_addr.s_addr = htonl(INADDR_ANY);

    bind(serverSocket, (SOCKADDR*)&addr, sizeof(addr));

    listen(serverSocket, SOMAXCONN);

    cout << "Server started." << endl;

    while (true) {
        SOCKET clientSocket = accept(serverSocket, NULL, NULL);
        cout << "Client connected." << endl;
        clients.push_back(clientSocket);
        thread t(handleClient, clientSocket);
        t.detach();
    }

    closesocket(serverSocket);

    WSACleanup();

    return 0;
}

客户端：

#include <WinSock2.h>
#include <iostream>
#include <string>

using namespace std;

SOCKET clientSocket;

void receiveData() {
    char buf[1024];
    int len;
    while (true) {
        len = recv(clientSocket, buf, sizeof(buf), 0);
        if (len == 0) {
            break;
        }
        buf[len] = '\0';
        cout << "Received: " << buf << endl;
    }
    closesocket(clientSocket);
}

int main() {
    WSADATA wsadata;
    WSAStartup(MAKEWORD(2, 2), &wsadata);

    clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    SOCKADDR_IN addr;
    addr.sin_family = AF_INET;
    addr.sin_port = htons(8888);
    addr.sin_addr.s_addr = inet_addr("127.0.0.1");

    connect(clientSocket, (SOCKADDR*)&addr, sizeof(addr));

    cout << "Connected to server." << endl;

    thread t(receiveData);
    t.detach();

    string msg;
    while (true) {
        getline(cin, msg);
        if (msg == "exit") {
            break;
        }
        send(clientSocket, msg.c_str(), msg.length(), 0);
    }

    closesocket(clientSocket);

    WSACleanup();

    return 0;
}

这个聊天程序实现了简单的群聊功能，能够让多个客户端连接到服务器并互相发送消息。当客户端输入“exit”时，程序结束。