<?php

class CharDisplay extends AbstractDisplay
{

   private $ch;
   
   public function __construct( $ch ) {
      $this->ch = $ch;
   }
   
   public function open() {
      echo "<<";
   }
   
   public function adPrint() {
      echo $this->ch;
   }
   
   public function close() {
      echo ">>";
      echo "\n";
   }
   
}

?>