发红包算法简单实现

没到年底，红包就满天飞，自己实现了个简单的发红包算法，简单测试没发现明显bug，直接上代码了，命名有点不规范

        //分红包
private static void fenhongbao(Random rd, float totalNum, int peopleNum){
float reveage = keep2Dot(totalNum / peopleNum);
System.out.println("平均：" + reveage);
float perNum = 0;
float tmpSum = 0;
for(int i = 0; i < peopleNum; i++){
if(i == (peopleNum - 1)){
perNum = keep2Dot(totalNum - tmpSum);
}else{
float nf = keep2Dot(rd.nextFloat() + 0.5f);
perNum = keep2Dot(nf * reveage);
}
tmpSum += perNum;
System.out.println("第" + (i + 1) + "人" + "领了" + perNum + "元");
}
System.out.println("总共：" + keep2Dot(tmpSum));
}

private static float keep2Dot(float f){
f = Math.round(f * 100) / 100.0f; 
return f;
}