package qianghongbao;

import java.util.Random;

public class HongBao {
    private double remainMoney;  //剩余的钱
    private int remainSize;      //剩余的红包数量

    public HongBao(double total, int count) {
        this.remainMoney = total;
        this.remainSize = count;
    }

    public double getRemainMoney() {
        return remainMoney;
    }
    public int getRemainSize() {
        return remainSize;
    }

    public double getRandomMoney(){

        double money;
        if(remainSize == 1){
            remainSize--;
            money = (double)Math.round(remainMoney * 100 )/100;
        }
        else if(remainSize > 1){
            double min = 0.01;
            double max = remainMoney / remainSize * 2;
            money = new Random().nextDouble() * max;
            money = money <= min ? min : money;
            money = Math.floor(money * 100) / 100;
            remainSize--;
            remainMoney -= money;
        }
        else {
            money = 0;
        }
//        System.out.println(Thread.currentThread().getName()+
//                "抢到"+money+"元，红包剩余"+remainSize+"个");
        return money;
    }
}

public static void main(String[] args) {
       /*==================复制======================*/
        //克隆
        int[] a = {1,2,3,4};
//        int[] copyA = a.clone();
//
//        int[] copyA = Arrays.copyOf(a, 4);
//
//        int[] copyA = Arrays.copyOfRange(a, 1, 4);
//
//       //a数组的0开始复制到copyA的1开始，复制长度3
//        int[] copyA = new int[4];
//        System.arraycopy(a, 0, copyA, 1, 3);
//        System.out.println(Arrays.toString(copyA));

        /*==================填充======================*/
        Arrays.fill(a, 100);
        System.out.println(Arrays.toString(a));

        Arrays.fill(a, 1,3,99);
        System.out.println(Arrays.toString(a));
    }