LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 24

这一行代码是用来检查Winsock的版本是否符合要求的。Winsock是Windows下的一个网络编程库，用于实现网络通信。这行代码中LOBYTE和HIBYTE是预处理宏，用于将一个16位的值分成高8位和低8位，wsaData.wVersion是一个16位的值，表示Winsock的版本号。如果Winsock的版本号不是2.4，这行代码会返回true，表示版本号不符合要求。

相关问题

LOBYTE(wsadata.wVersion)解释该代码以及HIBYTE(wsadata.wVersion)

LOBYTE(wsadata.wVersion)表示从wsadata.wVersion中提取低字节，而HIBYTE(wsadata.wVersion)表示从wsadata.wVersion中提取高字节。

wsadata.wVersion是Winsock数据结构中的一个成员，代表Winsock的版本号。LOBYTE和HIBYTE可以帮助我们从版本号中提取不同的字节来进行相关操作，例如判断Winsock的版本是否满足我们的要求。

客户端代码 #define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(1, 1); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return -1; } if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) { WSACleanup(); return -1; } SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1"); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); send(sockClient, "hello\0", strlen("hello") + 1, 0); char recvBuf[50]; recv(sockClient, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockClient); WSACleanup(); return 0;} 服务器端：#define _WINSOCK_DEPRECATED_NO_WARNINGS #include <stdio.h> #include <Winsock2.h> #ifndef MSG_NOSIGNAL #define MSG_NOSIGNAL 0 #endif #pragma comment(lib,"ws2_32.lib") int main() { WORD wVersionRequested; WSADATA wsaData; int err; wVersionRequested = MAKEWORD(2, 2); err = WSAStartup(wVersionRequested, &wsaData); if (err != 0) { return 1; } if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) { WSACleanup(); return 1; } SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0); int optval = 1; setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval)); SOCKADDR_IN addrSrv; addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY); addrSrv.sin_family = AF_INET; addrSrv.sin_port = htons(6000); bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR)); listen(sockSrv, 5); SOCKADDR_IN addrClient; int len = sizeof(SOCKADDR); while (1) { SOCKET sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len); char sendBuf[50]; printf(sendBuf, "Welcome %s to here!", inet_ntoa(addrClient.sin_addr)); send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL); char recvBuf[50]; recv(sockConn, recvBuf, 50, 0); printf("%s\n", recvBuf); closesocket(sockConn); } WSACleanup(); return 0;} 如何修改代码改成可以一直聊天的 不要预输入进去的 要我自己在客户端进行打字操作

要实现客户端和服务器之间的实时聊天，需要在客户端代码中添加一个循环来不断读取用户输入的消息，并将其发送给服务器。同时，在服务器端代码中也需要添加一个循环来不断接收客户端发送的消息，并将其广播给所有连接的客户端。

下面是修改后的客户端代码：

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <stdio.h>
#include <Winsock2.h>

#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif

#pragma comment(lib,"ws2_32.lib")
int main() {
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;
    wVersionRequested = MAKEWORD(1, 1);
    err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        return -1;
    }
    if (LOBYTE(wsaData.wVersion) != 1 || HIBYTE(wsaData.wVersion) != 1) {
        WSACleanup();
        return -1;
    }

    // 创建套接字并连接到服务器
    SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
    SOCKADDR_IN addrSrv;
    addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
    addrSrv.sin_family = AF_INET;
    addrSrv.sin_port = htons(6000);
    connect(sockClient, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));

    char sendBuf[50], recvBuf[50];
    while (1) {
        // 读取用户输入的消息并发送给服务器
        printf("Input message to send: ");
        fgets(sendBuf, 50, stdin);
        send(sockClient, sendBuf, strlen(sendBuf) + 1, 0);

        // 接收服务器的响应并打印出来
        recv(sockClient, recvBuf, 50, 0);
        printf("Received from server: %s\n", recvBuf);
    }

    closesocket(sockClient);
    WSACleanup();
    return 0;
}

下面是修改后的服务器端代码：

#define _WINSOCK_DEPRECATED_NO_WARNINGS
#include <stdio.h>
#include <Winsock2.h>

#ifndef MSG_NOSIGNAL
#define MSG_NOSIGNAL 0
#endif

#pragma comment(lib,"ws2_32.lib")
int main() {
    WORD wVersionRequested;
    WSADATA wsaData;
    int err;
    wVersionRequested = MAKEWORD(2, 2);
    err = WSAStartup(wVersionRequested, &wsaData);
    if (err != 0) {
        return 1;
    }
    if (LOBYTE(wsaData.wVersion) != 2 || HIBYTE(wsaData.wVersion) != 2) {
        WSACleanup();
        return 1;
    }

    // 创建套接字并绑定到本地地址和端口
    SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
    int optval = 1;
    setsockopt(sockSrv, SOL_SOCKET, SO_REUSEADDR, (const char*)&optval, sizeof(optval));
    SOCKADDR_IN addrSrv;
    addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    addrSrv.sin_family = AF_INET;
    addrSrv.sin_port = htons(6000);
    bind(sockSrv, (SOCKADDR*)&addrSrv, sizeof(SOCKADDR));

    // 监听连接请求并接受客户端连接
    listen(sockSrv, 5);
    SOCKADDR_IN addrClient;
    int len = sizeof(SOCKADDR);
    SOCKET sockConn;
    fd_set fdReads;

    while (1) {
        // 使用 select() 函数实现非阻塞接收客户端连接
        FD_ZERO(&fdReads);
        FD_SET(sockSrv, &fdReads);
        int ret = select(sockSrv + 1, &fdReads, NULL, NULL, NULL);
        if (ret < 0) {
            break;
        }
        if (FD_ISSET(sockSrv, &fdReads)) {
            sockConn = accept(sockSrv, (SOCKADDR*)&addrClient, &len);
            char sendBuf[50];
            printf(sendBuf, "Welcome %s to here!\n", inet_ntoa(addrClient.sin_addr));
            send(sockConn, sendBuf, strlen(sendBuf) + 1, MSG_NOSIGNAL);
        }

        // 使用 select() 函数实现非阻塞接收客户端消息
        FD_ZERO(&fdReads);
        FD_SET(sockConn, &fdReads);
        ret = select(sockConn + 1, &fdReads, NULL, NULL, NULL);
        if (ret < 0) {
            break;
        }
        if (FD_ISSET(sockConn, &fdReads)) {
            char recvBuf[50];
            recv(sockConn, recvBuf, 50, 0);
            printf("Received from client: %s\n", recvBuf);

            // 将客户端发送的消息广播给所有连接的客户端
            for (SOCKET i = 0; i < FD_SETSIZE; i++) {
                if (FD_ISSET(i, &fdReads)) {
                    send(i, recvBuf, strlen(recvBuf) + 1, MSG_NOSIGNAL);
                }
            }
        }
    }

    closesocket(sockSrv);
    WSACleanup();
    return 0;
}