client.c

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

#define MAXLINE 256

int main()
{
	struct sockaddr_in serv;
	char buf[MAXLINE];
	int sockfd;

	bzero(&serv, sizeof(serv));
	serv.sin_family = PF_INET;
	serv.sin_port = htons(8000);
	serv.sin_addr.s_addr = inet_addr("127.0.0.1");

	sockfd = socket(PF_INET, SOCK_STREAM, 0);
	connect(sockfd, (struct sockaddr *)&serv, sizeof(serv));
	while (fgets(buf, MAXLINE, stdin)) {
		write(sockfd, buf, strlen(buf)+1);
		read(sockfd, buf, MAXLINE);
		printf("Response from server: %s", buf);
	}
	return 0;
}