服务器端代码：

#include
#include
#include
#include
#include
#include
#include
#include
#include

//服务器端
void main(int * argc, const char* argv[])
{

//创建监听套接字
int lfd = socket(AF_INET,SOCK_STREAM,0);
//绑定监听套接字
struct sockaddr_in serv;
memset(&serv,0,sizeof(serv));
serv.sin_family = AF_INET;
serv.sin_addr.s_addr = htonl(INADDR_ANY);
serv.sin_port = htons(6868);
bind(lfd,(struct sockaddr*)&serv, sizeof(serv));
//设置监听
listen(lfd, 36);
//等待并接收链接请求
struct sockaddr_in client;
socklen_t client_len = sizeof(client);
char buf[1024] = {0};
while (1)
{
printf(“server is ready listen\n”);
int cfd = accept(lfd,(struct sockaddr *)&client, &client_len);

    if(cfd == -1) {perror("accept error");exit(1);}//读数据while (1) {int len = read(cfd,&buf,sizeof(buf));if(-1 == len){perror("read error\n");exit(1);}else if(0 == len){printf("client close connect\n");break;}else{printf("client send data:%s\n",buf);//发送数据write(cfd,&buf,strlen(buf));}memset(buf,0,strlen(buf));}
}

//关闭套接字
close(lfd);
}

客户端代码：

#include
#include
#include
#include
#include
#include
#include
#include
#include

int main(int * argc, const char * argv[])
{
//初始化通信套接字
int cfd = socket(AF_INET,SOCK_STREAM,0);
//初始化服务器地址信息
struct sockaddr_in serv;
memset(&serv,0,sizeof(serv));
serv.sin_family = AF_INET;
serv.sin_port = htons(6868);
inet_pton(AF_INET,“INADDR_ANY”,&serv.sin_addr.s_addr);

//链接服务器
connect(cfd,(const struct sockaddr *)&serv,sizeof(serv));while (cfd != -1)
{//发送数据char buf[1024];printf("please input data\n");fgets(buf,sizeof(buf),stdin);write(cfd,&buf,strlen(buf));//接收数据int len = read(cfd,buf,sizeof(buf));if(-1 == len){perror("read error\n");exit(1);}else if(0 == len){printf("server close connect\n");break;}else{printf("recv data: %s\n", buf);}
}//关闭套接字
close(cfd);

}

结果：