多线程网络聊天（示范代码）

server 服务器端

#include <stdlib.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <pthread.h>
#include <stdio.h>
#include <string.h>
#include <arpa/inet.h>

#define PORT 8848
#define BACKLOG 10
#define MAXDATASIZE 128
#define MAXUSER 9

void fuck_filter(const char* buf);
int select_user(char uname);
void process_cli(int connectfd, struct sockaddr_in client);
void* creat_conn(void* arg);

struct ARG {
       int connfd;
       struct sockaddr_in client;
};

struct USER {
       int connfd;
       char name;
}user[MAXUSER+1];

static int u_len = 0;

///////////////////////////////// 

int main(void)
{