linux下c言語socket client

/*
 ============================================================================
 Name        : socket.c
 Author      : 
 Version     :
 Copyright   : Your copyright notice
 Description : Hello World in C, Ansi-style
 ============================================================================
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include<arpa/inet.h>

const int MAXLINE = 5;
int main(void) {
	int sockfd;
	struct sockaddr_in server_addr;
	struct hostent *host;

	host = gethostbyname("127.0.0.1");
	sockfd = socket(AF_INET, SOCK_STREAM, 0);
	if (sockfd == -1) {
		perror("   ");
		exit(1);
	}

	bzero(&server_addr, sizeof(server_addr));

	server_addr.sin_family = AF_INET;
	server_addr.sin_port = htons(1024);
	server_addr.sin_addr = *((struct in_addr*) host->h_addr);

	int cn = connect(sockfd, (struct sockaddr *) &server_addr,
			sizeof(server_addr));
	if (cn == -1) {
		perror("   ");
		exit(1);

	}
	char *buf = "   ...";
	write(sockfd, buf, strlen(buf));
	close(sockfd);
	return EXIT_SUCCESS;
}