/* client process */ 
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h> 
#include <netinet/in.h>
#define SIZE sizeof(struct sockaddr_in)

main(int argvc, char ** argv){
int sockfd;
char c, rc, *addr;
struct sockaddr_in server = {AF_INET, 7001,INADDR_ANY};

/* convert and store the server's IF address */
  addr=*++argv;
  printf("connecting to address %s\n",addr);
  server.sin_addr.s_addr = inet_addr(addr) ;
/* set up the transport end point */
  if ( (sockfd = socket(AF_INET, SOCK_STREAM, 0)) == -1){
    perror("socket call failed");
    exit (1) ;
  }
/* connect the socket to the server's address */
  if ( connect(sockfd, (struct sockaddr *)&server, SIZE) == -1){
    perror("connect call failed");
    exit(1);
  }
/* send and receive information with the server */
  for (rc = '\n';;) {
    if (rc == '\n')
       printf("Input a lower case character\n");
    c = getchar();
    send(sockfd, &c, 1, 0);
    if (recv(sockfd, &rc, 1, 0)>0)
      printf("%c", rc);
    else
    {
      printf("server has died\n");
      close(sockfd);
      exit(1);
    }
  }
}