封装练习
<?php
//作业:设计一个类,包含$a,$b,求和的方法,求乘积的方法,可以有初始值,要求$a和$b要大于零小于100
class YunSuan
{
private $a;
private $b;
function __construct($a,$b)
{
$this->a=$a;
$this->b=$b;
}
function __set($n,$v)
{
if($v>0 && $v<100)
{
$this->$n=$v;
}
}
function __get($n)
{
return $this->$n;
}
function He()
{
return $this->a+$this->b;
}
function Ji()
{
return $this->a*$this->b;
}
}
$r=new YunSuan(5,5);
$r->a = 1;
$r->b = 2;
echo $r->He();
echo "<br>";
echo $r->Ji();
?>