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一下客户端：

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#include

#define MAXDATASIZE 256

#define SERVPORT 4444

#define STDIN 0

int main(void){

int sockfd;

int recvbytes;

char buf[MAXDATASIZE];

char *str;

char name[MAXDATASIZE];

char send_str[MAXDATASIZE];

struct sockaddr_in serv_addr;

fd_set rfd_set,wfd_set,efd_set;

struct timeval timeout;

int ret;

if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1){

perror("socket");

exit(1);

}

bzero(&serv_addr,sizeof(struct sockaddr_in));

serv_addr.sin_family =AF_INET;

serv_addr.sin_port=htons(SERVPORT);

inet_aton("127.0.0.1",&serv_addr.sin_addr);

/* serv_addr.sin_addr.s_addr=inet_addr("192.168.1.107");*/

if(connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(struct sockaddr))==-1)

{

perror("connect");

exit(1);

}

fcntl(sockfd,F_SETFD,O_NONBLOCK);

printf("要聊天首先输入你的名字：");

scanf("%s",name);

name[strlen(name)]='\0';

printf("%s:",name);

fflush(stdout);

send(sockfd,name,strlen(name),0);

while(1){

FD_ZERO(&rfd_set);

FD_ZERO(&wfd_set);

FD_ZERO(&efd_set);

FD_SET(STDIN,&rfd_set);

FD_SET(sockfd,&rfd_set);

FD_SET(sockfd,&wfd_set);

FD_SET(sockfd,&efd_set);

timeout.tv_sec =5;

timeout.tv_usec =0;

ret =select(sockfd+1,&rfd_set,&wfd_set,&efd_set,&timeout);

if(ret ==0){

continue;

}

if(ret<0){

perror("select error:");

exit(-1);

}

if(FD_ISSET(STDIN,&rfd_set)){

fgets(send_str,256,stdin);

send_str[strlen(send_str)-1]='\0';

if(strncmp("quit",send_str,4)==0);

{

close(sockfd);

exit(0);

}

send(sockfd,send_str,strlen(send_str),0);

}

if(FD_ISSET(sockfd,&rfd_set))

{

recvbytes=recv(sockfd,buf,MAXDATASIZE,0);

if(recvbytes==0)

{

close(sockfd);

exit(0);

}

buf[recvbytes]='\0';

printf("Server:%s\n",buf);

printf("%s:",name);

fflush(stdout);

}

if(FD_ISSET(sockfd,&efd_set))

{

close(sockfd);

exit(0);

}

}

}