include <stdio.h>

include <stdlib.h>

include <sys/types.h>

include <sys/socket.h>

include <netinet/in.h>

include <arpa/inet.h>

include <time.h>

include <string.h>

include <unistd.h>

define MAXLINE 256

define PORT 7777

void sys_err(char *msg){

perror(msg);

exit(-1);

}

int main(int argc , char **argv){

int sockFd,n;

char recvLine[MAXLINE];

struct sockaddr_in servAddr;

if (argc != 2) {

sys_err("usage: a.out ");

}

sockFd=socket(AF_INET,SOCK_STREAM,0);

memset(&servAddr,0,sizeof(servAddr));

servAddr.sin_family = AF_INET;

servAddr.sin_port = htons(PORT);

if (inet_pton(AF_INET,argv[1],&servAddr.sin_addr) <= 0) {

sys_err("inet_pton error");

}

connect(sockFd,(struct sockaddr *)&servAddr,sizeof(servAddr));

while((n=read(sockFd,recvLine,MAXLINE)) >0 ){

recvLine[n] = '\0';

if(fputs(recvLine,stdout) == EOF){

sys_err("fputs error");

}

}

if(n <0){

sys_err("read error");

}

return 0;

}