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Java模拟微信抢红包

灵魂跑者 2022-01-16 阅读 83
import java.util.Scanner;
import java.util.Random;

public class RedBags{
    public static void main(String[] args) {
        System.out.println("********微信抢红包***********");
        Scanner sc = new Scanner(System.in);
        System.out.println("请输入红包总金额");
        double total = sc.nextDouble();
        System.out.println("请输入红包个数");
        int bagsum = sc.nextInt();
        double min = 0.01;
        Random random = new Random();
        if(total / bagsum == 0.01)
        {
            for (int i = 0; i < bagsum; i++) {
                double money = min;
                total -= money;
                System.out.println("第"+i+"个红包:"+String.format("%.2f",money)+"元");
            }
        }
        else if(total/bagsum<0.01)
        {
            System.out.println("每个人1分钱哦");
            return;
        }
        else
        {
            for (int i = 0; i < bagsum; i++) {
                double max = total - (bagsum - i)*min;
                double bound = max - min;
                double safe = (double) random.nextInt((int)(bound*100))/100;
                double money = safe + min;
                total = total - money;
                System.out.println("第"+i+"个红包:"+String.format("%.2f",money)+"元");

            }
        }
        System.out.println("第"+bagsum+"个红包:"+String.format("%.2f",total)+"元");
        sc.close();

    }
}
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