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C# 中小数点四舍五入到最接近的四分之一

发布于 2024-09-01 13:15:20 字数 112 浏览 4 评论 0原文

c# 中是否有一种简单的方法将小数四舍五入到最近的四分之一 iex0, x.25, x.50 x.75 例如 0.21 将四舍五入为 0.25，5.03 将四舍五入为 5.0

提前感谢您的帮助。

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你げ笑在眉眼 2024-09-08 13:15:21

将其乘以四，根据需要将其四舍五入为整数，然后再次除以四：

x = Math.Round (x * 4, MidpointRounding.ToEven) / 4;

舍入的各种选项及其解释，可以在这个优秀的答案中找到此处 :-)

Multiply it by four, round it as you need to an integer, then divide it by four again:

x = Math.Round (x * 4, MidpointRounding.ToEven) / 4;

The various options for rounding, and their explanations, can be found in this excellent answer here :-)

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清醇 2024-09-08 13:15:21

或者，您可以使用本博客中给出的 UltimateRoundingFunction：
http://rajputyh.blogspot.in/2014/09/ the-ultimate-rounding-function.html

//amountToRound =>;输入金额
//最近的=>如果四舍五入为 0.25，四舍五入为 1 美分则为 0.01，四舍五入为 1 美元则为 1
//公平=> 0 到 0.9999999___ 之间。
// 0 表示下限，0.99999... 表示上限。但对于天花板，我会推荐 Math.Ceiling
// 0.5 = 标准舍入函数。它会将边界情况四舍五入。即 1.5 比 2，而不是 1。
// 0.4999999...非标准舍入函数。边界大小写向下舍入。即 1.5 比 1，而不是 2。
// 0.75 表示前 75% 的值将向下舍入，其余 25% 的值将向上舍入。
小数 UltimateRoundingFunction（小数 amountToRound、小数 nearstOf、小数公平性）
{
    return Math.Floor(amountToRound/nearstOf+公平性)*nearstOf;
}

请拨打以下电话进行标准舍入。即 1.125 将四舍五入为 1.25

UltimateRoundingFunction(amountToRound, 0.25m, 0.5m);

调用下面的方法来四舍五入边界值。即 1.125 将四舍五入为 1.00

UltimateRoundingFunction(amountToRound, 0.25m, 0.4999999999999999m);

所谓的“银行家舍入”对于 UltimateRoundingFunction 是不可能的，您必须使用 paxdiablo 的答案来获得该支持:)

Alternatively, you can use UltimateRoundingFunction given in this blog:
http://rajputyh.blogspot.in/2014/09/the-ultimate-rounding-function.html

//amountToRound => input amount
//nearestOf => .25 if round to quater, 0.01 for rounding to 1 cent, 1 for rounding to $1
//fairness => btween 0 to 0.9999999___.
//            0 means floor and 0.99999... means ceiling. But for ceiling, I would recommend, Math.Ceiling
//            0.5 = Standard Rounding function. It will round up the border case. i.e. 1.5 to 2 and not 1.
//            0.4999999... non-standard rounding function. Where border case is rounded down. i.e. 1.5 to 1 and not 2.
//            0.75 means first 75% values will be rounded down, rest 25% value will be rounded up.
decimal UltimateRoundingFunction(decimal amountToRound, decimal nearstOf, decimal fairness)
{
    return Math.Floor(amountToRound / nearstOf + fairness) * nearstOf;
}

Call below for standard rounding. i.e. 1.125 will be rounded to 1.25

UltimateRoundingFunction(amountToRound, 0.25m, 0.5m);

Call below for rounding down border values. i.e. 1.125 will be rounded to 1.00

UltimateRoundingFunction(amountToRound, 0.25m, 0.4999999999999999m);

So called "Banker's Rounding" is not possible with UltimateRoundingFunction, you have to go with paxdiablo's answer for that support :)

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久而酒知 2024-09-08 13:15:21

注意：这不是您在脚本中执行的操作。

如果您有这样的情况：

    this.transform.position = new Vector3(
    x: Mathf.Round(this.transform.position.x) + direction.x,
    y: Mathf.Round(this.transform.position.y) + direction.y,
    z: 0.0f
    );

然后转到 Unity >项目设置>时间
然后你可以改变时间。

Notice: This isn't a thing you do in a script.

If you have something like this:

    this.transform.position = new Vector3(
    x: Mathf.Round(this.transform.position.x) + direction.x,
    y: Mathf.Round(this.transform.position.y) + direction.y,
    z: 0.0f
    );

Then go to Unity > Project Settings > Time
And then you can change the time.

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思念绕指尖 2024-09-08 13:15:21

基于此答案的扩展方法。

namespace j
{
    public static class MathHelpers
    {
        public static decimal RoundToNearestQuarter(this decimal x)
        {
            return Math.Round(x * 4, MidpointRounding.ToEven) / 4;
        }
    }
}

An extension method based on this answer.

namespace j
{
    public static class MathHelpers
    {
        public static decimal RoundToNearestQuarter(this decimal x)
        {
            return Math.Round(x * 4, MidpointRounding.ToEven) / 4;
        }
    }
}

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