<body>
<?php
//设计模式：工厂模式
/*
class YunSuan
{
public $a;
public $b;
function Jia()
{
return ($this->a+$this->b);
}
function Jian()
{
return ($this->a-$this->b);
}
function Cheng()
{
return ($this->a*$this->b);
}
function Chu()
{
return ($this->a/$this->b);
}
function Yu()
{
return ($this->a%$this->b);
}
}
$y = new YunSuan();
$y->a = 10;
$y->b = 5;
echo $y->Jia();*/
//造父类，用子类继承
class YunSuan
{
public $a;
public $b;
function YunSuan()
{
}
}
//加法的子类
class Jia extends YunSuan
{
function YunSuan()
{
return ($this->a+$this->b);
}
}
//减法的子类
class Jian extends YunSuan
{
function YunSuan()
{
return ($this->a-$this->b);
}
}
$y = new Jian();
$y->a = 10;
$y->b = 5;
//echo $y->YunSuan();
//再优化，工厂类
class GongChang
{
static function DuiXiang($f)
{
switch($f)
{
case "+":
return new Jia();
break;
case "-":
return new Jian();
break;
case "*":
return new Cheng();
break;
}
}
}
$r = GongChang::DuiXiang("-");
$r->a=10;
$r->b = 5;
echo $r->YunSuan();
/*
class Suan
{
public $total;
function Jia($a)
{
$this->total = $this->total+$a;
return $this->total;
}
function Jian($a)
{
$this->total = $this->total-$a;
}
}*/
?>
</body>
</html>