Web Development

#include <sys/types.h><br />
<br />
#include <sys/socket.h><br />
#include <netinet/in.h><br />
#include <arpa/inet.h><br />
#include <string.h><br />
#include <unistd.h><br />
#include <stdlib.h><br />
#include <stdio.h><br />
#include <netdb.h><br />
<br />
int main (int argc, char *argv[] )<br />
{<br />
  int s, n;<br />
  struct sockaddr_in sin; struct hostent *hptr;<br />
  char msg[80] = "Hello World!";<br />
  if ( argc < 3 ) {<br />
    printf ("%s host port\n", argv[0] );   /* input error: need host & port */<br />
    return -1;<br />
  }<br />
  if ( (s = socket(PF_INET, SOCK_STREAM, 0 ) ) < 0) { /* create socket*/<br />
    perror("socket");  /* socket error */<br />
    return -1;<br />
  }<br />
  sin.sin_family = PF_INET;              /*set protocol family to Internet */<br />
  sin.sin_port = htons(atoi(argv[2]));  /* set port no. */<br />
  if ( (hptr =  gethostbyname(argv[1]) ) == NULL){<br />
    fprintf(stderr, "gethostname error: %s", argv[1]);<br />
    return -1;<br />
   }<br />
  memcpy( &sin.sin_addr, hptr->h_addr, hptr->h_length);<br />
  if (connect (s, (struct sockaddr *)&sin, sizeof(sin) ) < 0 ){<br />
    perror("connect"); return -1;   /* connect error */<br />
  }<br />
  if ( write(s, msg, strlen(msg) +1) < 0 ) {  /* send message to server */<br />
    perror("write");    return -1; /*  write error */<br />
  }<br />
  if ( ( n = read(s, msg, sizeof(msg) ) ) <0) {  /* read message from server */<br />
    perror("read"); return -1; /*  read error */<br />
  }<br />
  printf (" %d bytes: %s\n", n, msg);  /* print message to screen */<br />
  /* close connection, clean up socket */<br />
  if (close(s) < 0) { <br />
    perror("close");   /* close error */<br />
    return -1;<br />
  }<br />
  return 0;<br />
}<br />

<br />
// hide text<br />
with (document)<br />
{<br />
	write("<STYLE TYPE='text/css'>");<br />
	write(".hiddentext {display:none}  .outline {cursor:hand; text-decoration:underline}");<br />
	write("</STYLE>");<br />
}<br />
<br />
// show text on click<br />
function expandIt(whichEl)<br />
{<br />
	whichEl.style.display = (whichEl.style.display == "block" ) ? "none" : "block";<br />
}<br />