#include <stdio.h>#include <sys/types.h>#include <sys/socket.h>#include <netinet/in.h>#include <string.h>#include <arpa/inet.h> int main(int argc, char *argv[]){    int client_sockfd;    int len;    struct sockaddr_in remote_addr; //服务器端网络地址结构体    char buf[BUFSIZ];  //数据传送的缓冲区    memset(&remote_addr,0,sizeof(remote_addr)); //数据初始化--清零    remote_addr.sin_family=AF_INET; //设置为IP通信    remote_addr.sin_addr.s_addr=inet_addr("127.0.0.1");//服务器IP地址    remote_addr.sin_port=htons(8000); //服务器端口号         /*创建客户端套接字--IPv4协议，面向连接通信，TCP协议*/    if((client_sockfd=socket(PF_INET,SOCK_STREAM,0))<0)    {          perror("socket");          return 1;    }         /*将套接字绑定到服务器的网络地址上*/    if(connect(client_sockfd,(struct sockaddr *)&remote_addr,sizeof(struct sockaddr))<0)    {          perror("connect");          return 1;    }    printf("connected to server\n\n\n");    len=recv(client_sockfd,buf,BUFSIZ,0);//接收服务器端信息    printf("%s\n",buf); //打印服务器端信息         /*循环的发送接收信息并打印接收信息--recv返回接收到的字节数，send返回发送的字节数*/    while(1)    {        printf("\n\nEnter string to send:");        scanf("%s",buf);        if(!strcmp(buf,"quit"))  break;        len=send(client_sockfd,buf,strlen(buf),0);        len=recv(client_sockfd,buf,BUFSIZ,0);        printf("\n\nreceived:%s\n\n\n\n",buf);    }     close(client_sockfd);//关闭套接字        return 0;}