微信搶紅包簡易版，比較簡單，大夥別見笑，拿去直接用

import java.math.BigDecimal;
import java.util.Random;

public class CatchMoney {

	public static void main(String[] args) {
		double total = 100;//紅包總額
		int  num =8;//紅包數量
		double min =  0.01;//設定最低1分錢
		
		for(int i =1;i<num;i++){
			double safe_total = (total-(num-i)*min)/(num-i);//隨機安全上限
			double money = new Random().nextDouble()*(safe_total-min)+min;
			total = total -money;

			//System.out.println("第"+i+"個紅包"+setScale(money)+"元，餘額"+setScale(total)+"元");
			System.out.println("第"+i+"個紅包"+setScale(money)+"元");
		}
		
		System.out.println("第"+num+"個紅包"+setScale(total)+"元");
	}
	
	public static double setScale(double num){
		double newNum = new BigDecimal(num).setScale(2, BigDecimal.ROUND_HALF_UP).doubleValue();
		return newNum;
		
	}
	
}