适用范围：长整型long(-9223272036854775808 ~  +9223272036854775808)

        

//

BY: bit.Aipeli 2005-11-07 23:27:23

        

private

 

double

 Round(

double

 v,

int

 x)

        

{

            int i;

            long IValue=1;

            double DValue=1;

        

            for (i=1;i<=x;i++)

            {

                IValue=IValue*10;

                DValue=DValue/10;

            }

            long Int=(long)Decimal.Round(Convert.ToDecimal(v*IValue),0);

            double Key=(double)(v/DValue)-Int;

            double Dou=(double)Int/IValue;

            if (Key>=0.5)

            {

                Dou+=DValue;

            }

            return Dou;

        }

本代码在：Windows 2003 && Microsoft Visual Studio .NET 2003 通过