JAVA实现红包分发的示例代码

JAVA实现红包分发的示例代码

大体思路

代码

import java.util.Arrays;

import java.util.Random;

import java.math.*;

import java.util.Scanner;

public class Main {

public static long now_time;

public static long seed;

public static int[] get_red_packets(int money, int num) {

Random random = new Random(seed);

seed = random.nextLong();

int[] res = new int[num];

double[] temp=new double[num];

double sum = 0;

int sum2 = 0;

for (int i = 0; i < num; i++) {

temp[i] = random.nextDouble();

sum += temp[i];

}

for (int i = 0; i < num; i++) {

res[i] = 1+ (int)(temp[i] / sum * (money-num));

sum2 += res[i]-1;

}

res[random.nextInt(num)]+=money-sum2-num;

return res;

}

public static void show(int[] red_packet){

System.out.println("红包 : " + Arrays.toString(red_packet));

}

public static void main(String[] args) {

int num, money;

Schttp://anner scanner = new Scanner(System.in);

now_time = System.currentTimeMillis();

Random init_random = neaEPHSw Random(now_time);

seed = init_random.nextLong();

System.out.println("请输入要分发的红包数量:");

num = scanner.nextInt();

System.out.println("请输入要分发的红包总金额(分):");

money = scanner.nextInt();

int a[] = get_red_packets(money,num);

show(a);

}

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