<body>
<?php class jisuan
{
private $a;
private $b; function __construct($a,$b)
{
$this->a = $a;
$this->b = $b;
} function __set($d,$e)
{
if($e>0 and $e<100)
{
$this->$d=$e;
}
}
function __get($d)
{
return $this->$d;
} function he()
{
return $this->a+$this->b;
}
function ji()
{
return $this->a*$this->b;
} } $c=new jisuan(10,20); echo $c->he();
echo "<br>";
echo $c->ji(); ?>
</body>