利用多线程实现linux下C语言的聊天室程序：

来源：互联网发布：内地网络悬疑电视剧编辑：程序博客网时间：2024/06/04 14:37

转载：http://www.360doc.com/content/16/0421/11/478627_552531090.shtml

客户端代码：

threadsend线程负责客户端消息的发送；

threadrecv线程负责客户端接受服务器端的消息。

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#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <pthread.h>
#define MAXLINE 100;
void *threadsend(void *vargp);
void *threadrecv(void *vargp);
int main()
{
int *clientfdp;
clientfdp = (int *)malloc(sizeof(int));
*clientfdp = socket(AF_INET,SOCK_STREAM,0);
struct sockaddr_in serveraddr;
struct hostent *hp;
bzero((char *)&serveraddr,sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(15636);
serveraddr.sin_addr.s_addr = inet_addr("127.0.0.1");
if(connect(*clientfdp,(struct sockaddr *)&serveraddr,sizeof(serveraddr)) < 0){
printf("connect error\n");
exit(1);
}
pthread_t tid1,tid2;
printf("connected\n");
while(1){
pthread_create(&tid1,NULL,threadsend,clientfdp);
pthread_create(&tid2,NULL,threadrecv,clientfdp);
}
return EXIT_SUCCESS;
}
void *threadsend(void * vargp)
{
//pthread_t tid2;
int connfd = *((int *)vargp);
int idata;
char temp[100];
while(1){
//printf("me: \n ");
fgets(temp,100,stdin);
send(connfd,temp,100,0);
printf(" client send OK\n");
}
printf("client send\n");
return NULL;
}
void *threadrecv(void *vargp)
{
char temp[100];
int connfd = *((int *)vargp);
while(1){
int idata = 0;
idata = recv(connfd,temp,100,0);
if(idata > 0){
printf("server :\n%s\n",temp);
}
}
return NULL;
}

服务器端代码：

threadsend负责服务器端发送信息；

threadrecv负责接受客户端信息。

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#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <arpa/inet.h>
#include <pthread.h>
#define PORT 15636
void *thread(void *vargp);
void *threadsend(void *vargp);
void *threadrecv(void *vargp);
int main()
{
int listenfd = socket(AF_INET, SOCK_STREAM,0);
if(listenfd < 0){
perror("socket");
exit(1);
}
struct hostent *hp;
struct sockaddr_in serveraddr;
bzero((char *)&serveraddr,sizeof(serveraddr));
serveraddr.sin_family = AF_INET;
serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
serveraddr.sin_port = htons(PORT);
if(bind(listenfd,(struct sockaddr *)&serveraddr,sizeof(serveraddr)) < 0){
perror("connect");
exit(1);
}
if(listen(listenfd,1024) < 0){
perror("listen error");
exit(1);
}
//char temp[100];
struct sockaddr_in clientaddr;
int clientlen, *connfdp;
clientlen = sizeof(clientaddr);
while(1){
connfdp = (int *)malloc(sizeof(int));
*connfdp = accept(listenfd,(struct sockaddr *)&clientaddr, &clientlen);
pthread_t tid;
printf("Accepted!\n");
pthread_create(&tid,NULL,thread,connfdp);
}
EXIT_SUCCESS;
}
void *thread(void *vargp)
{
pthread_t tid1,tid2;
int connfd = *((int *)vargp);
int idata;
char temp[100];
pthread_create(&tid1,NULL,threadsend,vargp);
pthread_create(&tid2,NULL,threadrecv,vargp);
return NULL;
}
void *threadsend(void * vargp)
{
int connfd = *((int *)vargp);
int idata;
char temp[100];
while(1){
//printf("server input: ");
fgets(temp,100,stdin);
send(connfd,temp,100,0);
printf(" server send OK\n");
}
return NULL;
}
void *threadrecv(void *vargp)
{
char temp[100];
int connfd = *((int *)vargp);
while(1){
int idata = 0;
idata = recv(connfd,temp,100,0);
if(idata > 0){
printf("client :\n%s\n",temp);
}
}
return NULL;
}

问题：

linux下编译多线程代码时，shell提示找不到 pthread_create函数，原因是 pthread.h不是linux系统默认加载的库文件，应该使用类似如下gcc命令进行编译：

gcc echoserver.c -lpthread -o echoserver

只要注意 -lpthread参数就可以了。

运行结果：

客户端：

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[root@localhost unixIO]# ./echoclient
connected
hello!
client send OK
goodmorning
client send OK
server :
goodmorning too!
server :
how r u?
fine
client send OK

服务器端：

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[root@localhost unixIO]# ./echoserver
Accepted!
client :
hello!
client :
goodmorning
goodmorning too!
server send OK
how r u?
server send OK
client :
fine

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