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四舍五入函数

2012-09-09 15:39:38| 分类： C# & .NET | 标签： |举报 |字号大中小订阅

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很简单的一件事，我不知道为什么这么简单的程序都要问我，自己就不能上网查查么？好吧，我自己也写一个，虽然原始环境是C#，但是基本上做到了和语言无关（类C语言都可以，我没有使用任何系统函数，例如Math.Pow()等）：

/// <summary>

/// 四舍五入函数

/// </summary>

/// <param name="d">待修剪数</param>

/// <param name="n">保留小数点后的位数</param>

/// <returns>返回修剪后的值</returns>

double Rounder(double d,int n)

{

double mi = 1;

//here does not use the Math.Pow() function.

//thus this function could be transfered to other language

//by small modification

for (int i = 1; i <= n; i++)

mi *= 10;

d = d * mi + 0.5;

long l = (long)d;

return l / mi;

}

如果作为类的成员的话，需要加上一些访问修饰符，例如private static什么的。

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日志

四舍五入函数

历史上的今天

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日志

四舍五入函数

历史上的今天

最近读者

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评论

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