PHP基于工厂模式实现的计算器实例

本文实例讲述了php基于工厂模式实现的计算器。分享给大家供大家参考。具体如下：

abstract class calculator
{
 private $number1;
 private $number2;
 public $result;
 /**
  * @return the $number2
  */
 public function getnumber2() {
  return $this->number2;
 }
 /**
  * @param field_type $number2
  */
 public function setnumber2($number2) {
  $this->number2 = $number2;
 }
 /**
  * @return the $number1
  */
 public function getnumber1() {
  return $this->number1;
 }
 /**
  * @param field_type $number1
  */
 public function setnumber1($number1) {
  $this->number1 = $number1;
 }
 abstract function get_result();
 }
class add extends calculator
{
  public function get_result($number1,$number2)
  {
   return $number1+$number2;
  }
}
class sub extends calculator
{
  public function get_result($number1,$number2)
  {
   return $number1-$number2;
  }
}
class mul extends calculator
{
  public function get_result($number1,$number2)
  {
   return $number1*$number2;
  }
}
class div extends calculator
{
  public function get_result($number1,$number2)
  {
   return $number1/$number2;
  }
}
class factory
{
  public function building($notes)
  {
   if($notes=="+")
   {
    $add=new add();
    return $add;
   }
   elseif ($notes=="-")
   {
    $sub=new sub();
    return $sub;
   }
   elseif($notes=="*")
   {
    $mul=new mul();
    return $mul;
   }
   else
   {
    $div=new div();
    return $div;
   }
  }
}

希望本文所述对大家的php程序设计有所帮助。