public class hongbao {
@Test
public void testHongbao(){
hb(100, 100, 0.01);//金額，個數，最少值
}
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+"個紅包："+money+",余額為:"+total+"元");
}
System.out.println("第"+num+"個紅包："+total+",余額為:0元");
}
void zb(){
for(int a=0;a<=10000;a++){
if(a % 1000== 0)
System.out.println (a);
}
}
}