Decimal.Compare(Decimal, Decimal) 方法
定义
重要
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比较两个指定的 Decimal 值。
public:
static int Compare(System::Decimal d1, System::Decimal d2);public static int Compare (decimal d1, decimal d2);static member Compare : decimal * decimal -> intPublic Shared Function Compare (d1 As Decimal, d2 As Decimal) As Integer参数
- d1
- Decimal
要比较的第一个值。
- d2
- Decimal
要比较的第二个值。
返回
有符号数字，指示 d1 和 d2 的相对值。
| 返回值 | 含义 |
|---|---|
| 小于零 |
d1 小于 d2。
|
| 零 |
d1 与 d2 相等。
|
| 大于零 |
d1 大于 d2。
|
示例
以下示例比较了多个 Decimal 值。 请注意，第一个比较表明，尽管对 value2 变量执行了减法运算，但两个值相等。 这是因为 类型 Decimal 具有 29 位精度，而只能用 30 位精度检测这两个值之间的差异。
using System;
public enum Relationship
{ LessThan = -1, Equals = 0, GreaterThan = 1 }
public class Example
{
public static void Main()
{
decimal value1 = Decimal.MaxValue;
decimal value2 = value1 - .01m;
Console.WriteLine("{0} {2} {1}", value1, value2,
(Relationship) Decimal.Compare(value1, value2));
value2 = value1 / 12m - .1m;
value1 = value1 / 12m;
Console.WriteLine("{0} {2} {1}", value1, value2,
(Relationship) Decimal.Compare(value1, value2));
value1 = value1 - .2m;
value2 = value2 + .1m;
Console.WriteLine("{0} {2} {1}", value1, value2,
(Relationship) Decimal.Compare(value1, value2));
}
}
// The example displays the following output:
// 79228162514264337593543950335 Equals 79228162514264337593543950335
// 6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
// 6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2
open System
type Relationship =
| LessThan = -1
| Equals = 0
| GreaterThan = 1
[<EntryPoint>]
let main _ =
let value1 = Decimal.MaxValue
let value2 = value1 - 0.01m
printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"
let value2 = value1 / 12m - 0.1m
let value1 = value1 / 12m
printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"
let value1 = value1 - 0.2m
let value2 = value2 + 0.1m
printfn $"{value1} {Decimal.Compare(value1, value2) |> enum<Relationship>} {value2}"
0
// The example displays the following output:
// 79228162514264337593543950335 Equals 79228162514264337593543950335
// 6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
// 6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2
Public Enum Relationship As Integer
LessThan = -1
Equals = 0
GreaterThan = 1
End Enum
Module Example
Public Sub Main()
Dim value1 As Decimal = Decimal.MaxValue
Dim value2 As Decimal = value1 - .01d
Console.WriteLine("{0} {2} {1}", value1, value2,
CType(Decimal.Compare(value1, value2), Relationship))
value2 = value1 / 12d - .1d
value1 = value1 / 12d
Console.WriteLine("{0} {2} {1}", value1, value2,
CType(Decimal.Compare(value1, value2), Relationship))
value1 = value1 - .2d
value2 = value2 + .1d
Console.WriteLine("{0} {2} {1}", value1, value2,
CType(Decimal.Compare(value1, value2), Relationship))
End Sub
End Module
' The example displays the following output:
' 79228162514264337593543950335 Equals 79228162514264337593543950335
' 6602346876188694799461995861.2 GreaterThan 6602346876188694799461995861.1
' 6602346876188694799461995861.0 LessThan 6602346876188694799461995861.2
