java数组实现红包的方法

 package Hongbao;

 import java.text.DecimalFormat;
 import java.util.Scanner;

 public class Hongbao {
     public static void main(String[] args) {
         Scanner sc=new Scanner(System.in);

         System.out.println("请输入红包金额：");
         double money=sc.nextDouble();

         System.out.println("请输入红包个数：");
         int count=sc.nextInt();

         //有序数组1到99
         int[] num=new int[100];
         for (int i = 1; i < 100; i++) {
             num[i-1]=i;
         }

         //有序数组打乱
         for (int i = 0; i < num.length; i++) {
             int ran=(int)(Math.random()*100);
             int temp=num[i];
             num[i]=num[ran];
             num[ran]=temp;
         }

         //将分配的红包个数赋给新数组
         int[] acount=new int[count];
         for (int i = 0; i < count; i++) {
             acount[i]=num[i];
         }
         //冒泡排序
         for (int i = 0; i < acount.length; i++) {
             for (int j = 0; j < acount.length-1-i; j++) {
                 if(acount[j]>acount[j+1]){
                   int temp=acount[j];
                   acount[j]=acount[j+1];
                   acount[j+1]=temp;
                 }
             }
         }

         //红包分钱算法
         int[] mon=new int[count];
         for (int i = 0; i < count; i++) {
             if(i==0){
                 mon[0]=acount[0];
             }else if(i>0&&i<count-1){
                 mon[i]=acount[i]-acount[i-1];
             }else{
                 mon[i]=100-acount[i-1];
             }
         }

         //带钱
         DecimalFormat df=new DecimalFormat("####0.00");//保留两位小数
         for (int i = 0; i < mon.length; i++) {
             System.out.println("第"+(i+1)+"名，领取"+df.format(mon[i]*0.01*money)+"元红包");
         }

     }
 }