用面向对象做练习题

<?php
header("Content-type:text/html; charset=gbk");

class Renwu{
    public $name;   //姓名
    public $xueliang;    //血量
    public $gongjili;    //攻击力
    //放技能的方式
    public function jineng(){
    $a = array(
    array(50,"打狗棍法"),
    array(60,"天降正义"),
    array(50,"一阳指"),
    array(80,"致命一击")
    );
    $jn = count($a);
    
    $pg = rand(0,$jn-1);
    echo "{$this->name}使用了{$a[$pg][1]}
";
    return $a[$pg][0];
}    
    //构造函数
    public function __construct($name,$xueliang,$gongjili1){
        $this->name = $name;
        $this->xueliang = $xueliang;
        $this->gongjili = $gongjili1 ;
    }
    
}
//造第一个人
$h1 = new Renwu("李逍遥",1000,50);
//造第二个人
$h2 = new Renwu("独孤求败",1200,52);


while(true){
//随机一下攻击，是普攻还是技能
    $sj1 = rand(0,1);
    $gj1 = 0;   //本次h1能打掉多少血
    echo "{$h1->name}打{$h2->name}
";
    if($sj1){
    $gj1 = $h1->jineng();
    }else{
    $gj1 = $h1->gongjili+rand(0,30);
    }
    $h2->xueliang = $h2->xueliang-$gj1;
    echo "{$h1->name}打掉了{$h2->name}的{$gj1}血
";
    echo "**************************
";
    
    $sj2 = rand(0,1);
    $gj2 = 0;   //本次h2能打掉多少血
    echo "{$h2->name}打{$h1->name}
";
    if($sj2){
    $gj2 = $h2->jineng();
    }else{
    $gj2 = $h2->gongjili+rand(0,30);
    }
    $h1->xueliang = $h1->xueliang-$gj;
    echo "{$h2->name}打掉了{$h1->name}的{$gj2}血
";
    echo "**************************
";
    
    if($h2->xueliang<=0){
    echo "{$h1->name}赢了";
    break;
    }else if($h1->xueliang<=0){
    echo "{$h2->name}赢了";
    break;
}    

//休眠
    sleep(3);
}