用C语言实现简单的聊天室功能

服务器端

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<winsock.h>
#pragma comment(lib, "ws2_32.lib") 
#define L 256
int main() {
    char SendBuf[L];
    char ReceiveBuf[L];
    int SendLen;
    int ReceiveLen;
    int Length;

    SOCKET socket_server;
    SOCKET socket_receive;

    SOCKADDR_IN ServerAdd;
    SOCKADDR_IN ClientAdd;
    WORD wVR;
    WSADATA WsaData;
    int error;


    //++++++++++++++++++++++++++++++++++++++++++++++++
    wVR = MAKEWORD(2, 2);
    error = WSAStartup(wVR, &WsaData);
    if (error != 0) {
        printf("加载套接字失败！");
        return 0;
    }
    if (LOBYTE(WsaData.wVersion) != 2 || HIBYTE(WsaData.wVersion) != 2) {
        printf("版本不符！");
        WSACleanup();
        return 0;
    }
    //++++++++++++++++++++++++++++++++++++++++++++++++
    ServerAdd.sin_family = AF_INET;
    ServerAdd.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
    ServerAdd.sin_port = htons(5000);
    //++++++++++++++++++++++++++++++++++++++++++++++++
    socket_server = socket(AF_INET, SOCK_STREAM, 0);
    //++++++++++++++++++++++++++++++++++++++++++++++++
    if (bind(socket_server, (SOCKADDR*)&ServerAdd, sizeof(SOCKADDR)) == SOCKET_ERROR) {
        printf("绑定失败！\n");
    }
    //++++++++++++++++++++++++++++++++++++++++++++++++
    if (listen(socket_server, 5) < 0) {
        printf("监听失败!\n");
    }
    Length = sizeof(SOCKADDR);
    socket_receive = accept(socket_server, (SOCKADDR*)&ClientAdd, &Length);
    if (socket_receive == SOCKET_ERROR) {
        printf("接受连接失败！\n");
    }
    while (1) {
        ReceiveLen = recv(socket_receive, ReceiveBuf, L, 0);
        if (ReceiveLen < 0) {
            printf("接受失败\n程序退出！\n");
            break;
        }
        else {
            printf("client say:%s\n", ReceiveBuf);
        }
        //++++++++++++++++++++++++++++++++++++++++++++++++
        printf("please enter message:");
        scanf("%s", SendBuf);
        SendLen = send(socket_receive, SendBuf, L, 0);
        if (SendLen < 0) {
            printf("发送失败\n");
        }
    }
    closesocket(socket_receive);
    closesocket(socket_server);
    return 0;
}

客户端

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
#include<winsock.h>
#pragma comment(lib, "ws2_32.lib") 
#define L 256
int main() {
    char SendBuf[L];
    char ReceiveBuf[L];
    int SendLen;
    int ReceiveLen;
    int Length;

    SOCKET socket_send;

    SOCKADDR_IN ServerAdd;

    WORD wVR;
    WSADATA WsaData;
    int error;


    //++++++++++++++++++++++++++++++++++++++++++++++++
    wVR = MAKEWORD(2, 2);
    error = WSAStartup(wVR, &WsaData);
    if (error != 0) {
        printf("加载套接字失败！");
        return 0;
    }
    if (LOBYTE(WsaData.wVersion) != 2 || HIBYTE(WsaData.wVersion) != 2) {
        printf("版本不符！");
        WSACleanup();
        return 0;
    }
    //++++++++++++++++++++++++++++++++++++++++++++++++
    ServerAdd.sin_family = AF_INET;
    ServerAdd.sin_addr.S_un.S_addr = inet_addr("192.168.190.1");
    ServerAdd.sin_port = htons(5000);
    //++++++++++++++++++++++++++++++++++++++++++++++++

    socket_send = socket(AF_INET, SOCK_STREAM, 0);


    if (connect(socket_send, (SOCKADDR*)&ServerAdd, sizeof(SOCKADDR)) == SOCKET_ERROR) {
        printf("连接失败！\n");
    }
    //++++++++++++++++++++++++++++++++++++++++++++++++
    while (1) {
        printf("please enter message:");
        scanf("%s", SendBuf);
        SendLen = send(socket_send, SendBuf, L,0);
        if (SendLen < 0) {
            printf("发送失败！\n");
        }
        //++++++++++++++++++++++++++++++++++++++++++++++++
        ReceiveLen = recv(socket_send, ReceiveBuf, L, 0);
        if (ReceiveLen < 0) {     
            printf("接受失败！\n程序退出\n");
            break;
        }
        else {
            printf("Server say:%s\n", ReceiveBuf);
        }
    }
    closesocket(socket_send);
    WSACleanup();
    return 0;

}