Window下的socket编程（c++实现）

#include<winsock2.h>
#include<iostream>
#include<string>
using namespace std;
#pragma comment(lib,"ws2_32.lib")

int main(int argc, char* argv[]) {

    //初始化DLL
    WORD sockVersion = MAKEWORD(2, 2);
    WSADATA wsdata;
    if (WSAStartup(sockVersion, &wsdata) != 0)
    {
        return 1;
    }

    //创建套接字
    SOCKET serverSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (serverSocket == INVALID_SOCKET)
    {
        cout << "Socket error" << endl;
        return 1;
    }


    //绑定套接字
    sockaddr_in sockAddr;
    sockAddr.sin_family = AF_INET;
    sockAddr.sin_port = htons(8888);
    sockAddr.sin_addr.S_un.S_addr = INADDR_ANY;

    if (bind(serverSocket, (sockaddr*)&sockAddr, sizeof(sockAddr)) == SOCKET_ERROR) {
        cout << "Bind error" << endl;
        return 1;
    }

    //开始监听
    if (listen(serverSocket, 10) == SOCKET_ERROR) {
        cout << "Listen error" << endl;
        return 1;
    }


    SOCKET clientSocket;
    sockaddr_in client_sin;
    char msg[100];//存储传送的消息
    int flag = 0;//是否已经连接上
    int len = sizeof(client_sin);
    while (true) {
        if (!flag)
            cout << "等待连接..." << endl;
        clientSocket = accept(serverSocket, (sockaddr*)&client_sin, &len);
        if (clientSocket == INVALID_SOCKET) {
            cout << "Accept error" << endl;
            flag = 0;
            return 1;
        }
        if (!flag)
            cout << "接收到一个链接：" << inet_ntoa(client_sin.sin_addr) << endl;
        flag = 1;
        int num = recv(clientSocket, msg, 100, 0);
        if (num > 0)
        {
            msg[num] = '\0';
            cout << "Client say: " << msg << endl;

        }

        string data;
        getline(cin, data);
        const char* sendData;
        sendData = data.c_str();
        send(clientSocket, sendData, strlen(sendData), 0);
        closesocket(clientSocket);
    }

    closesocket(serverSocket);
    WSACleanup();



    return 0;
}

#include<winsock2.h>
#include<iostream>
#include<string>
using namespace std;
#pragma comment(lib, "ws2_32.lib")

int main()
{
    WORD sockVersion = MAKEWORD(2, 2);
    WSADATA data;
    if (WSAStartup(sockVersion, &data) != 0)
    {
        return 1;
    }

    while (true) {
        SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
        if (clientSocket == INVALID_SOCKET) {
            cout << "Socket error" << endl;
            return 1;
        }
        sockaddr_in sock_in;
        sock_in.sin_family = AF_INET;
        sock_in.sin_port = htons(8888);
        sock_in.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
        if (connect(clientSocket, (sockaddr*)&sock_in, sizeof(sock_in)) == SOCKET_ERROR) {
            cout << "Connect error" << endl;
            return 1;
        }

        string data;
        getline(cin, data);
        const char* msg;
        msg = data.c_str();
        send(clientSocket, msg, strlen(msg), 0);

        char revdata[100];
        int num = recv(clientSocket, revdata, 100, 0);
        if (num > 0) {
            revdata[num] = '\0';
            cout << "Sever say:" << revdata << endl;
        }
        closesocket(clientSocket);

    }

    WSACleanup();

    return 0;
}