截断两位小数四舍五入无 [英] Truncate Two decimal places without rounding
本文介绍了截断两位小数四舍五入无的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
可以说,我有一个3.4679的价值和希望3.46,我怎么能截断到小数点后两位,如果没有四舍五入?
我曾尝试以下,但所有三个给我3.47:
无效的主要()
{
Console.Write(Math.Round(3.4679,2,MidpointRounding.ToEven));
Console.Write(Math.Round(3.4679,2,MidpointRounding.AwayFromZero));
Console.Write(Math.Round(3.4679,2));
}
这将返回3.46,但似乎只是脏一些如何:
无效的主要()
{
Console.Write(Math.Round(3.46799999999 -.005,2));
}
解决方案
值= Math.Truncate(100 *值)/ 100;
要小心,像这样的分数不能准确重于浮点psented $ P $。
Lets say I have a value of 3.4679 and want 3.46, how can I truncate to two decimal places that without rounding up?
I have tried the following but all three give me 3.47:
void Main()
{
Console.Write(Math.Round(3.4679, 2,MidpointRounding.ToEven));
Console.Write(Math.Round(3.4679, 2,MidpointRounding.AwayFromZero));
Console.Write(Math.Round(3.4679, 2));
}
This returns 3.46, but just seems dirty some how:
void Main()
{
Console.Write(Math.Round(3.46799999999 -.005 , 2));
}
解决方案
value = Math.Truncate(100 * value) / 100;
Beware that fractions like these cannot be accurately represented in floating point.
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