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利用多线程实现linux下C语言的聊天室程序：
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轉載：http://www.360doc.com/content/16/0421/11/478627_552531090.shtml
利用多線程實現linux下C語言的聊天室程序：
客戶端代碼：
threadsend線程負責客戶端消息的發送；
threadrecv線程負責客戶端接受服務器端的消息。
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?copy #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;??}??
服務器端代碼：
threadsend負責服務器端發送信息；
threadrecv負責接受客戶端信息。
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?copy #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;??}??
問題：
linux下編譯多線程代碼時，shell提示找不到 pthread_create函數，原因是 pthread.h不是linux系統默認加載的庫文件，應該使用類似如下gcc命令進行編譯：
gcc echoserver.c -lpthread -o echoserver
只要注意 -lpthread參數就可以了。
運行結果：
客戶端：
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?copy [root@localhost?unixIO]#?./echoclient??connected??hello!????????????client?send?OK??goodmorning????????????client?send?OK??server?:??goodmorning?too!????server?:??how?r?u?????fine????????????client?send?OK??
服務器端：
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?copy [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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