每瓶啤酒2元，2个空酒瓶或4个瓶盖可换1瓶啤酒。10元最多可喝多少瓶啤酒？ php

            //根据题意设定初始变量值
//然后 一个while循环去操作
//每换得一个瓶子，换的那个减去要做相应的数目
//然后喝了啤酒后， 各数量加1
//直到不符合要求。跳出循环
 1
            class
             Beer{

             2
             3
            protected
            $uni_gai      = 4;    //每4个瓶盖1瓶 4protected$uni_bottle   = 2;    //每两个瓶子换1瓶 5protected$uni_beer     = 2;    //每瓶2块钱 6protected$rs           = array();//存取结果 7protected$total        = 0;      //当前买了啤酒的数量 8protected$gai          = 0;      //当前有多少个啤酒 9protected$empty_bottle = 0;      //空瓶子1011publicfunction __construct($money){
12$cur = $money / $this->uni_beer;
13$this->total        = $cur;
14$this->gai          = $cur;
15$this->empty_bottle = $cur;
16    }
1718publicfunction run(){
19while($this->gai > 0 || $this->empty_bottle > 0){
20if($this->gai >= $this->uni_gai){
21$this->deal_num(‘gai‘);
22            }
23if($this->empty_bottle >= $this->uni_bottle){
24$this->deal_num(‘empty_bottle‘);
25            }
2627$this->check_overflow();
28        }
29return$this->rs;
30    }
3132publicfunction deal_num($type){
33if($type == ‘gai‘){
34$this->gai -= $this->uni_gai;
35         }else{
36$this->empty_bottle -= $this->uni_bottle;
37        }
38$this->gai++;
39$this->empty_bottle++;
40$this->total++;
41    }
42publicfunction check_overflow(){
43if($this->gai < $this->uni_gai && $this->empty_bottle < $this->uni_bottle){
44$this->rs[‘gai‘]          = $this->gai;
45$this->rs[‘total‘]        = $this->total;
46$this->rs[‘empty_bottle‘] = $this->empty_bottle;
47$this->gai                = 0;
48$this->empty_bottle       = 0;
49        }
50    }
51publicfunction _print(){
52echo ‘gai:‘, $this->gai;
53echo ‘<br>‘;
54echo ‘empty_bottle:‘, $this->empty_bottle;
55echo ‘<br>‘;
56echo ‘total‘, $this->total;
57echo ‘<hr>‘;
58    }
59}
6061$peer = new Beer(10);
62$rs   = $peer->run();
63print_r($rs);