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PHP数三退1面向对象的写法

Jun 13, 2016 am 10:49 AM
Circle first gt right this

PHP数3退1面向对象的写法

<?php //用面向对象的方法写 将猴子选大王实现 同样数3退1        class Monkey {                /**                 * 定义猴子类                  * 属性  编号 $id                     *       左手 $left  表示的当前猴子左边的猴子                 *       右手 $right 表示的当前猴子右边的猴子                */                        public $id;                        public $left;                        public $right;        }        class Circle{                /**                 * 定义圈类                  * 属性  猴子的总数 $ct                     *       开始的猴子 $first                  *       结束的猴子 $last                   */                public $ct = 0;                public $first;                public $last;                //构造方法创建圈                //参数是猴子的个数                function __construct($c){                        for($i=0;$i<$c;$i++){                                $this->add();                        }                }                //猴子的添加方法                function add(){                        $m = new Monkey();                        $m->id = $this->ct;                        if($this->ct==0){                                $this->first = $m;                                $this->last = $m;                                $m->left = $m;                                $m->right = $m;                        }else{                                $this->last->right = $m;                                $m->left = $this->last;                                $m->right = $this->first;                                $this->first->left = $m;                                $this->last = $m;                        }                        $this->ct++;                }                //猴子的删除方法                function del($m){                        if($this->ct ct == 1){                                                        $this->first = $this->last = null;                        }else{                                $m->left->right = $m->right;                                $m->right->left = $m->left;                                if($m == $this->first){                                        $this->first = $m->right;                                }else if($m == $this->last){                                        $this->last = $m->left;                                }                        }                        $this->ct--;                }                }        /*                这里的代码就是实现让500只猴子围城一圈然后                数三个退一个就这样直到还剩一个把那猴子的编号打印出来        */        $circle = new Circle(500);        $number = 0;        $mk = $circle->first;        while($circle->ct > 1){                $number++;                if($number == 3){                        $number = 0;                        $circle->del($mk);                }                $mk = $mk->right;        }        echo $circle->first->id;?> 
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