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

{

$p=new Div();

return $p;

}

}

}

希望本文所述对大家的php程序设计有所帮助。