Decimal 乗算演算子

[アーティクル]
03/28/2008

指定した 2 つの Decimal 値を乗算します。

returnValue = Decimal.op_Multiply(d1, d2)
[C#]
public static decimal operator *(decimald1,decimald2);
[C++]
public: static Decimal op_Multiply(Decimald1,Decimald2);
[JScript]
returnValue = d1 * d2;

[Visual Basic] Visual Basic では、この型で定義されている演算子を使用することができます。ただし、独自に定義することはできません。Multiply メソッドを Decimal 乗算演算子の代わりに使用することができます。

[JScript] JScript では、この型で定義されている演算子を使用することができます。ただし、独自に定義することはできません。

引数 [Visual Basic, JScript]

d1
Decimal 。
d2
Decimal 。

パラメータ [C#, C++]

d1
Decimal 。
d2
Decimal 。

戻り値

d1 に d2 を乗算した結果の Decimal 。

例外

例外の種類	条件
OverflowException	戻り値が MinValue より小さい値か、 MaxValue より大きい値です。

使用例

[Visual Basic, C#, C++] Decimal 値の複数のペアを作成し、各ペアの積を Multiplication 演算子で計算するコード例を次に示します。

 
' Example of the Decimal multiplication, division, and modulus 
' operators.
Imports System
Imports Microsoft.VisualBasic

Module DecimalMulDivRemOpsDemo
    
    Const dataFmt As String = "{0,-38}{1,31}"

    ' Display Decimal parameters and their product, quotient, and 
    ' remainder.
    Sub ShowDecimalProQuoRem( Left as Decimal, Right as Decimal )

        Console.WriteLine( )
        Console.WriteLine( dataFmt, "Decimal Left", Left )
        Console.WriteLine( dataFmt, "Decimal Right", Right )

        ' The op_Multiply, op_Division, and op_Modulus operators must 
        ' be explicitly coded in Visual Basic. If binary *, /, or 
        ' Mod are used, other methods are called.
        Console.WriteLine( dataFmt, _
            "Decimal.op_Multiply( Left, Right )", _
            Decimal.op_Multiply( Left, Right ) )
        Console.WriteLine( dataFmt, _
            "Decimal.op_Division( Left, Right )", _
            Decimal.op_Division( Left, Right ) )
        Console.WriteLine( dataFmt, _
            "Decimal.op_Modulus( Left, Right )", _
            Decimal.op_Modulus( Left, Right ) )
    End Sub

    Sub Main( )
        Console.WriteLine( _
            "This example of the Decimal multiplication, " & _
            "division, and modulus " & vbCrLf & "operators " & _
            "generates the following output. It displays the " & _
            "product, " & vbCrLf & "quotient, and remainder of " & _
            "several pairs of Decimal objects." )

        ' Create pairs of Decimal objects.
        ShowDecimalProQuoRem( 1000D, 7D ) 
        ShowDecimalProQuoRem( -1000D, 7D ) 
        ShowDecimalProQuoRem( _
            new Decimal( 1230000000, 0, 0, False, 7 ), _
            0.0012300D )
        ShowDecimalProQuoRem( 12345678900000000D, _
            0.0000000012345678D )
        ShowDecimalProQuoRem( 123456789.0123456789D, _
            123456789.1123456789D )
    End Sub
End Module 

' This example of the Decimal multiplication, division, and modulus
' operators generates the following output. It displays the product,
' quotient, and remainder of several pairs of Decimal objects.
' 
' Decimal Left                                                     1000
' Decimal Right                                                       7
' Decimal.op_Multiply( Left, Right )                               7000
' Decimal.op_Division( Left, Right )     142.85714285714285714285714286
' Decimal.op_Modulus( Left, Right )                                   6
' 
' Decimal Left                                                    -1000
' Decimal Right                                                       7
' Decimal.op_Multiply( Left, Right )                              -7000
' Decimal.op_Division( Left, Right )    -142.85714285714285714285714286
' Decimal.op_Modulus( Left, Right )                                  -6
' 
' Decimal Left                                              123.0000000
' Decimal Right                                                 0.00123
' Decimal.op_Multiply( Left, Right )                     0.151290000000
' Decimal.op_Division( Left, Right )                          100000.00
' Decimal.op_Modulus( Left, Right )                                   0
' 
' Decimal Left                                        12345678900000000
' Decimal Right                                      0.0000000012345678
' Decimal.op_Multiply( Left, Right )          15241577.6390794200000000
' Decimal.op_Division( Left, Right )     10000000729000059778004901.796
' Decimal.op_Modulus( Left, Right )                      0.000000000983
' 
' Decimal Left                                     123456789.0123456789
' Decimal Right                                    123456789.1123456789
' Decimal.op_Multiply( Left, Right )     15241578765584515.651425087878
' Decimal.op_Division( Left, Right )     0.9999999991899999933660999449
' Decimal.op_Modulus( Left, Right )                123456789.0123456789

[C#] 
// Example of the decimal multiplication, division, and modulus 
// operators.
using System;

class DecimalMulDivRemOpsDemo
{
    const string dataFmt = "   {0,-18}{1,31}";

    // Display decimal parameters and their product, quotient, and 
    // remainder.
    public static void ShowDecimalProQuoRem( decimal Left, decimal Right )
    {
        Console.WriteLine( );
        Console.WriteLine( dataFmt, "decimal Left", Left );
        Console.WriteLine( dataFmt, "decimal Right", Right );
        Console.WriteLine( dataFmt, "Left * Right", Left * Right );
        Console.WriteLine( dataFmt, "Left / Right", Left / Right );
        Console.WriteLine( dataFmt, "Left % Right", Left % Right );
    }

    public static void Main( )
    {
        Console.WriteLine( 
            "This example of the decimal multiplication, division, " +
            "and modulus \noperators generates the following " +
            "output. It displays the product, \nquotient, and " +
            "remainder of several pairs of decimal objects." );

        // Create pairs of decimal objects.
        ShowDecimalProQuoRem( 1000M, 7M );
        ShowDecimalProQuoRem( -1000M, 7M );
        ShowDecimalProQuoRem( 
            new decimal( 1230000000, 0, 0, false, 7 ), 0.0012300M );
        ShowDecimalProQuoRem( 12345678900000000M, 
            0.0000000012345678M );
        ShowDecimalProQuoRem( 123456789.0123456789M, 
            123456789.1123456789M );
    }
}

/*
This example of the decimal multiplication, division, and modulus
operators generates the following output. It displays the product,
quotient, and remainder of several pairs of decimal objects.

   decimal Left                                 1000
   decimal Right                                   7
   Left * Right                                 7000
   Left / Right       142.85714285714285714285714286
   Left % Right                                    6

   decimal Left                                -1000
   decimal Right                                   7
   Left * Right                                -7000
   Left / Right      -142.85714285714285714285714286
   Left % Right                                   -6

   decimal Left                          123.0000000
   decimal Right                           0.0012300
   Left * Right                     0.15129000000000
   Left / Right                               100000
   Left % Right                                    0

   decimal Left                    12345678900000000
   decimal Right                  0.0000000012345678
   Left * Right            15241577.6390794200000000
   Left / Right       10000000729000059778004901.796
   Left % Right                       0.000000000983

   decimal Left                 123456789.0123456789
   decimal Right                123456789.1123456789
   Left * Right       15241578765584515.651425087878
   Left / Right       0.9999999991899999933660999449
   Left % Right                 123456789.0123456789
*/

[C++] 
// Example of the Decimal multiplication, division, and modulus 
// operators.
#using <mscorlib.dll>
using namespace System;

// Display Decimal parameters and their product, quotient, and 
// remainder.
void ShowDecimalProQuoRem( Decimal Left, Decimal Right )
{
    String* dataFmt = S"   {0,-18}{1,31}";

    Console::WriteLine( );
    Console::WriteLine( dataFmt, S"Decimal Left", __box( Left ) );
    Console::WriteLine( dataFmt, S"Decimal Right", __box( Right ) );
    Console::WriteLine( dataFmt, S"Left * Right", 
        __box( Left * Right ) );
    Console::WriteLine( dataFmt, S"Left / Right", 
        __box( Left / Right ) );
    Console::WriteLine( dataFmt, S"Left % Right", 
        __box( Left % Right ) );
}

void main( )
{
    Console::WriteLine( 
        S"This example of the Decimal multiplication, division, " 
        S"and modulus \noperators generates the following " 
        S"output. It displays the product, \nquotient, and " 
        S"remainder of several pairs of Decimal objects." );

    // Create pairs of Decimal objects.
    ShowDecimalProQuoRem( Decimal::Parse( S"1000" ), 
        Decimal::Parse( S"7" ) );
    ShowDecimalProQuoRem( Decimal::Parse( S"-1000" ), 
        Decimal::Parse( S"7" ) );
    ShowDecimalProQuoRem( 
        Decimal( 1230000000, 0, 0, false, 7 ), 
        Decimal::Parse( S"0.0012300" ) );
    ShowDecimalProQuoRem( Decimal::Parse( S"12345678900000000" ), 
        Decimal::Parse( S"0.0000000012345678" ) );
    ShowDecimalProQuoRem( Decimal::Parse( S"123456789.0123456789" ), 
        Decimal::Parse( S"123456789.1123456789" ) );
}

/*
This example of the Decimal multiplication, division, and modulus
operators generates the following output. It displays the product,
quotient, and remainder of several pairs of Decimal objects.

   Decimal Left                                 1000
   Decimal Right                                   7
   Left * Right                                 7000
   Left / Right       142.85714285714285714285714286
   Left % Right                                    6

   Decimal Left                                -1000
   Decimal Right                                   7
   Left * Right                                -7000
   Left / Right      -142.85714285714285714285714286
   Left % Right                                   -6

   Decimal Left                          123.0000000
   Decimal Right                           0.0012300
   Left * Right                     0.15129000000000
   Left / Right                               100000
   Left % Right                                    0

   Decimal Left                    12345678900000000
   Decimal Right                  0.0000000012345678
   Left * Right            15241577.6390794200000000
   Left / Right       10000000729000059778004901.796
   Left % Right                       0.000000000983

   Decimal Left                 123456789.0123456789
   Decimal Right                123456789.1123456789
   Left * Right       15241578765584515.651425087878
   Left / Right       0.9999999991899999933660999449
   Left % Right                 123456789.0123456789
*/

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, .NET Compact Framework - Windows CE .NET, Common Language Infrastructure (CLI) Standard

参照

Decimal 構造体 | Decimal メンバ | System 名前空間 | Multiply

次の方法で共有

Decimal 乗算演算子

引数 [Visual Basic, JScript]

パラメータ [C#, C++]

戻り値

例外

使用例

必要条件

参照

その他のリソース