用c语言写一个聊天程序参考

对话框程序

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>
#include <windows.h>

#pragma comment(lib,"ws2_32.lib")

#define BUF_SIZE 100
#define NAME_SIZE 20

void ErrorHandling(char* message);

int main(int argc, char* argv[])
{
    WSADATA wsaData;
    SOCKET hSocket;
    SOCKADDR_IN servAddr;
    char message[BUF_SIZE];
    int strLen, i;
    char nameMsg[NAME_SIZE + BUF_SIZE];

    if (argc != 4) {
        printf("Usage : %s <IP> <port> <name>\n", argv[0]);
        exit(1);
    }

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
        ErrorHandling("WSAStartup() error!");

    sprintf(nameMsg, "%s ", argv[3]);
    while (1) {
        fputs("Input message(Q to quit): ", stdout);
        fgets(message, BUF_SIZE, stdin);

        if (!strcmp(message, "q\n") || !strcmp(message, "Q\n"))
            break;

        strcat(nameMsg, message);
        sendto(hSocket, nameMsg, strlen(nameMsg), 0,
            (SOCKADDR*)&servAddr, sizeof(servAddr));
        strLen = recvfrom(hSocket, message, BUF_SIZE - 1, 0, NULL, 0);
        if (strLen < 0)
            break;
        message[strLen] = 0;
        printf("Message from server: %s", message);
        nameMsg[NAME_SIZE] = 0;
    }

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

void ErrorHandling(char* message)
{
    fputs(message, stderr);
    fputc('\n', stderr);
    exit(1);
}

服务器程序

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <winsock2.h>

#pragma comment(lib,"ws2_32.lib")

#define BUF_SIZE 100
#define NAME_SIZE 20

void ErrorHandling(char* message);

int main(int argc, char* argv[])
{
    WSADATA wsaData;
    SOCKET hSocket;
    SOCKADDR_IN servAddr, clntAddr;
    char message[BUF_SIZE];
    int strLen, i;
    int clntAdrSz;

    if (argc != 2) {
        printf("Usage : %s <port>\n", argv[0]);
        exit(1);
    }

    if (WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
        ErrorHandling("WSAStartup() error!");

    hSocket = socket(PF_INET, SOCK_DGRAM, 0);
    if (hSocket == INVALID_SOCKET)
        ErrorHandling("socket() error");

    memset(&servAddr, 0, sizeof(servAddr));
    servAddr.sin_family = AF_INET;
    servAddr.sin_addr.s_addr = htonl(INADDR_ANY);
    servAddr.sin_port = htons(atoi(argv[1]));

    if (bind(hSocket, (SOCKADDR*)&servAddr, sizeof(servAddr)) == SOCKET_ERROR)
        ErrorHandling("bind() error");

    while (1) {
        clntAdrSz = sizeof(clntAddr);
        strLen = recvfrom(hSocket, message, BUF_SIZE, 0,
            (SOCKADDR*)&clntAddr, &clntAdrSz);
        if (strLen < 0)
            break;
        message[strLen] = 0;
        sendto(hSocket, message, strLen, 0,
            (SOCKADDR*)&clntAddr, sizeof(clntAddr));
    }

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

void ErrorHandling(char* message)
{
    fputs(message, stderr);
    fputc('\n', stderr);
    exit(1);
}
``