Decimal.Decrement(Decimal) 運算子
重要
部分資訊涉及發行前產品,在發行之前可能會有大幅修改。 Microsoft 對此處提供的資訊,不做任何明確或隱含的瑕疵擔保。
將 Decimal 運算元減一。
public:
static System::Decimal operator --(System::Decimal d);
public:
static System::Decimal operator --(System::Decimal d) = System::Numerics::IDecrementOperators<System::Decimal>::op_Decrement;
C#
public static decimal operator --(decimal d);
static member op_Decrement : decimal -> decimal
Public Shared op_Decrement (d As Decimal) As Decimal
- d
- Decimal
要遞減的值。
d
減一的值。
傳回值小於 Decimal.MinValue 或大於 Decimal.MaxValue。
方法 Decrement 會針對 Decimal 值定義遞減運算子的作業。 它會啟用下列程式碼:
C#
using System;
public class Example
{
public static void Main()
{
Decimal number = 1079.8m;
Console.WriteLine("Original value: {0:N}", number);
Console.WriteLine("Decremented value: {0:N}", --number);
}
}
// The example displays the following output:
// Original value: 1,079.80
// Decremented value: 1,078.80
let number = 1079.8m
printfn $"Original value: {number:N}"
printfn $"Decremented value: {- -number:N}"
// The example displays the following output:
// Original value: 1,079.80
// Decremented value: 1,078.80
某些語言 (例如缺少遞增運算子的 Visual Basic) 可以直接呼叫 Decrement 方法,如下列範例所示。
VB
Module Example
Public Sub Main()
Dim number As Decimal = 1079.8d
Console.WriteLine("Original value: {0:N}", number)
Console.WriteLine("Decremented value: {0:N}", Decimal.op_Decrement(number))
End Sub
End Module
' The example displays the following output:
' Original value: 1,079.80
' Decremented value: 1,078.80
如果您的語言不支援自訂運算子,請改為呼叫 Subtract 方法,如下列範例所示。
C#
using System;
public class Example
{
public static void Main()
{
Decimal number = 1079.8m;
Console.WriteLine("Original value: {0:N}", number);
Console.WriteLine("Decremented value: {0:N}", Decimal.Subtract(number, 1));
}
}
// The example displays the following output:
// Original value: 1,079.80
// Decremented value: 1,078.80
open System
let number = 1079.8m
printfn $"Original value: {number:N}"
printfn $"Decremented value: {Decimal.Subtract(number, 1):N}"
// The example displays the following output:
// Original value: 1,079.80
// Decremented value: 1,078.80
Module Example
Public Sub Main()
Dim number As Decimal = 1079.8d
Console.WriteLine("Original value: {0:N}", number)
Console.WriteLine("Decremented value: {0:N}", Decimal.Subtract(number, 1))
End Sub
End Module
' The example displays the following output:
' Original value: 1,079.80
' Decremented value: 1,078.80
產品 | 版本 |
---|---|
.NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
.NET Framework | 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
.NET Standard | 1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 2.0, 2.1 |
UWP | 10.0 |