<meta charset="utf-8">

<?php

// 新年红包金额拆分试玩

class CBonus

{

    public $bonus;//红包

    public $bonus_num;//红包个数

    public $bonus_money;//红包总金额

    public $money_single_max;//单个红包限额

    public function __construct(){

        $this->bonus_num = 10;

        $this->bonus_money = 200;

        $this->money_single_max = 60;

    }

    private function randomFloat($min = 0, $max = 1) {

        $mt_rand = mt_rand();

        $mt_getrandmax = mt_getrandmax();

        echo 'mt_rand=' . $mt_rand . ', mt_getrandmax=' . $mt_getrandmax . '<hr/>';

        return $min + $mt_rand / $mt_getrandmax * ($max - $min);

    }

    //计算

    public function compute()

    {

        $this->bonus = array();

        $bonus_money_temp = $this->bonus_money;

        $money_single_max = $this->money_single_max;

        $i = 1;

        while($i < $this->bonus_num)

        {

            if ($money_single_max > $bonus_money_temp)

            {

                $money_single_max = floatval(sprintf("%01.2f", $bonus_money_temp / 2));//剩余金额不够分时,把剩余金额的一半作为备用金

            }

            $bonus_money_rad = $this->randomFloat(0.01, $money_single_max);//一个红包随机金额 最小的1分钱

            $bonus_money_rad = floatval(sprintf("%01.2f", $bonus_money_rad));

            $bonus_money_temp = $bonus_money_temp - $bonus_money_rad ;//待分配的总剩余金额

            $bonus_money_temp = floatval(sprintf("%01.2f", $bonus_money_temp));

            $this->bonus[] = $bonus_money_rad;

            //echo $bonus_money_rad . ',' . $bonus_money_temp . '<hr/>';

            $i++;

        }

        $this->bonus[] = $bonus_money_temp;//分配剩余金额给最后一个红包

    }

    //打印

    public function output(){

        $total = 0;

        foreach($this->bonus as $k => $v)

        {

            echo '红包' . ($k+1) . '=' . $v . '<br/>';

            $total += $v;

        }

        echo '红包总金额:'.$total;

    }

}

$CBonus = new CBonus();

$CBonus->compute();

$CBonus->output();

?>