价格除以3 [英] Dividing prices by 3

问题描述

有关会计程序，我需要3所以可以共享超过3个月

For accounting program I need to divide a price by 3 so it can be shared over 3 months

例如9€

• 3€正月


• 3€第二个月


• 3€第三个月

现在，这将是价格/ 3

Now this would be price/3

但如果人数是10？

• 3,33€正月


• 3,33€第二个月


• 3,33€上个月

3,33€* 3 =€9.99加入

3,33€*3 =€9.99

一分钱不见了。
我怎样才能使它所以输出中会变得3,33€，3,33€，3,34€？

One cent has gone missing. How can I make it so the ouput would become 3,33€ , 3,33€ , 3,34€?

推荐答案

作为拔示巴说，首先问你的用户。

As Bathsheba said, ask your users first.

下面是我用过经常在这样的情况下的一种技术。这种方法将确保最均匀分布，朝向末端的向上偏压。例如，如果你调用 DivvyUp（101，3），您将获得 33.66，33.67，33.67 。注意，所不同的是不正好弥补了在末端。相反，每个值是根据什么剩下来计算的，而不是启动时使用。

Here's a technique that I've used often in such scenarios. This method will ensure the most even distribution, with the upward bias toward the end. For example, if you call DivvyUp(101, 3), you'll get 33.66, 33.67, 33.67. Notice that the difference isn't just made up for at the end. Instead, each value is computed according to what's left, not what was started with.

public static double[] DivvyUp(double total, uint count)
{
    var parts = new double[count];
    for (var i = 0; i < count; ++i)
    {
        var part = Math.Truncate((100d * total) / (count - i)) / 100d;
        parts[i] = part;
        total -= part;
    }
    return parts;
}

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