package com.sunron.test;


import java.math.BigDecimal;

import org.junit.Test;

public class HongBao {
	@Test
	public void testHonbao(){
		hb(100, 9, 0.01);//金额，个数，最少值
		//zb();
	}
	void hb(double total,int num,double min){
		for(int i=1;i<num;i++){
			double safe_total=(total-(num-i)*min)/(num-i);
			double money=Math.random()*(safe_total-min)+min;
			BigDecimal money_bd=new BigDecimal(money);
			money=money_bd.setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue();  
			total=total-money;
			BigDecimal total_bd=new BigDecimal(total);
			total=total_bd.setScale(2,BigDecimal.ROUND_HALF_UP).doubleValue();
			System.out.println("第"+i+"个红包："+money+",余额为:"+total+"元");
		}
		System.out.println("第"+num+"个红包："+total+",余额为:0元");
	}
	
	void zb(){
          for(int a=0;a<=10000;a++){
        	  if(a % 1000== 0) 
   		       System.out.println (a);
          }
		    
	}

}