c#中取整

Math.Round：四舍六入五取整
Math.Ceiling：向上取整，只要有小数都加1
Math.Floor：向下取整，总是舍去小数
示例：1.Math.Round：四舍六入五取偶Math.Round(0.0) //0Math.Round(0.1) //0Math.Round(0.2) //0Math.Round(0.3) //0Math.Round(0.4) //0Math.Round(0.5) //0Math.Round(0.6) //1Math.Round(0.7) //1Math.Round(0.8) //1Math.Round(0.9) //1说明：对于1.5，因要返回偶数，所以结果为2。2.Math.Ceiling：只要有小数都加1Math.Ceiling(0.0) //0Math.Ceiling(0.1) //1Math.Ceiling(0.2) //1Math.Ceiling(0.3) //1Math.Ceiling(0.4) //1Math.Ceiling(0.5) //1Math.Ceiling(0.6) //1Math.Ceiling(0.7) //1Math.Ceiling(0.8) //1Math.Ceiling(0.9) //1说明：例如在分页算法中计算分页数很有用。3.Math.Floor：总是舍去小数Math.Floor(0.0) //0Math.Floor(0.1) //0Math.Floor(0.2) //0Math.Floor(0.3) //0Math.Floor(0.4) //0Math.Floor(0.5) //0Math.Floor(0.6) //0Math.Floor(0.7) //0Math.Floor(0.8) //0Math.Floor(0.9) //0