BitConverter.ToDouble 메서드
정의
중요
일부 정보는 릴리스되기 전에 상당 부분 수정될 수 있는 시험판 제품과 관련이 있습니다. Microsoft는 여기에 제공된 정보에 대해 어떠한 명시적이거나 묵시적인 보증도 하지 않습니다.
오버로드
ToDouble(ReadOnlySpan<Byte>) |
읽기 전용 바이트 범위를 배정밀도 부동 소수점 값으로 변환합니다. |
ToDouble(Byte[], Int32) |
8바이트에서 변환된 배정밀도 부동 소수점 숫자를 바이트 배열의 지정된 위치에 반환합니다. |
ToDouble(ReadOnlySpan<Byte>)
읽기 전용 바이트 범위를 배정밀도 부동 소수점 값으로 변환합니다.
public:
static double ToDouble(ReadOnlySpan<System::Byte> value);
public static double ToDouble (ReadOnlySpan<byte> value);
static member ToDouble : ReadOnlySpan<byte> -> double
Public Shared Function ToDouble (value As ReadOnlySpan(Of Byte)) As Double
매개 변수
- value
- ReadOnlySpan<Byte>
변환할 바이트를 포함하는 읽기 전용 범위입니다.
반환
변환된 바이트를 나타내는 배정밀도 부동 소수점 값입니다.
예외
value
의 길이가 Double 값의 길이보다 작습니다.
적용 대상
ToDouble(Byte[], Int32)
8바이트에서 변환된 배정밀도 부동 소수점 숫자를 바이트 배열의 지정된 위치에 반환합니다.
public:
static double ToDouble(cli::array <System::Byte> ^ value, int startIndex);
public static double ToDouble (byte[] value, int startIndex);
static member ToDouble : byte[] * int -> double
Public Shared Function ToDouble (value As Byte(), startIndex As Integer) As Double
매개 변수
- value
- Byte[]
변환할 8바이트를 포함하는 바이트 배열입니다.
- startIndex
- Int32
value
내의 시작 위치입니다.
반환
8바이트로 구성된 배정밀도 부동 소수점 숫자입니다 startIndex
.
예외
startIndex
가 value
의 길이에서 7을 뺀 값보다 크거나 같고 value
의 길이에서 1을 뺀 값보다 작거나 같은 경우
value
이(가) null
인 경우
startIndex
가 0보다 작거나 value
- 1의 길이보다 큰 경우
예제
다음 코드 예제에서는 배열의 Byte 요소를 메서드를 사용하여 Double 값으로 ToDouble
변환합니다.
// Example of the BitConverter::ToDouble method.
using namespace System;
// Convert eight byte array elements to a double and display it.
void BAToDouble( array<unsigned char>^bytes, int index )
{
double value = BitConverter::ToDouble( bytes, index );
Console::WriteLine( "{0,5}{1,27}{2,27:E16}", index, BitConverter::ToString( bytes, index, 8 ), value );
}
// Display a byte array, using multiple lines if necessary.
void WriteMultiLineByteArray( array<unsigned char>^bytes )
{
const int rowSize = 20;
int iter;
Console::WriteLine( "initial unsigned char array" );
Console::WriteLine( "---------------------------" );
for ( iter = 0; iter < bytes->Length - rowSize; iter += rowSize )
{
Console::Write( BitConverter::ToString( bytes, iter, rowSize ) );
Console::WriteLine( "-" );
}
Console::WriteLine( BitConverter::ToString( bytes, iter ) );
Console::WriteLine();
}
int main()
{
array<unsigned char>^byteArray = {0,0,0,0,0,0,0,0,240,63,0,0,0,0,0,224,111,64,0,0,224,255,255,255,239,65,0,0,0,0,0,0,112,63,0,0,0,0,0,0,240,61,223,136,30,28,254,116,170,1,250,89,140,66,202,192,243,63,251,89,140,66,202,192,243,63,252,89,140,66,202,192,243,63,82,211,187,188,232,126,61,126,255,255,255,255,255,255,239,255,255,255,255,255,255,239,127,1,0,0,0,0,0,0,0,248,255,0,0,0,0,0,0,240,255,0,0,0,0,0,0,240,127};
Console::WriteLine( "This example of the BitConverter::ToDouble( unsigned "
"char[ ], int ) \nmethod generates the following output. It "
"converts elements of a \nbyte array to double values.\n" );
WriteMultiLineByteArray( byteArray );
Console::WriteLine( "{0,5}{1,27}{2,27:E16}", "index", "array elements", "double" );
Console::WriteLine( "{0,5}{1,27}{2,27:E16}", "-----", "--------------", "------" );
// Convert byte array elements to double values.
BAToDouble( byteArray, 0 );
BAToDouble( byteArray, 2 );
BAToDouble( byteArray, 10 );
BAToDouble( byteArray, 18 );
BAToDouble( byteArray, 26 );
BAToDouble( byteArray, 34 );
BAToDouble( byteArray, 42 );
BAToDouble( byteArray, 50 );
BAToDouble( byteArray, 58 );
BAToDouble( byteArray, 66 );
BAToDouble( byteArray, 74 );
BAToDouble( byteArray, 82 );
BAToDouble( byteArray, 89 );
BAToDouble( byteArray, 97 );
BAToDouble( byteArray, 99 );
BAToDouble( byteArray, 107 );
BAToDouble( byteArray, 115 );
}
/*
This example of the BitConverter.ToDouble( byte( ), int )
method generates the following output. It converts elements
of a byte array to double values.
initial byte array
------------------
00-00-00-00-00-00-00-00-F0-3F-00-00-00-00-00-E0-6F-40-00-00-
E0-FF-FF-FF-EF-41-00-00-00-00-00-00-70-3F-00-00-00-00-00-00-
F0-3D-DF-88-1E-1C-FE-74-AA-01-FA-59-8C-42-CA-C0-F3-3F-FB-59-
8C-42-CA-C0-F3-3F-FC-59-8C-42-CA-C0-F3-3F-52-D3-BB-BC-E8-7E-
3D-7E-FF-FF-FF-FF-FF-FF-EF-FF-FF-FF-FF-FF-FF-EF-7F-01-00-00-
00-00-00-00-00-F8-FF-00-00-00-00-00-00-F0-FF-00-00-00-00-00-
00-F0-7F
index array elements double
----- -------------- ------
0 00-00-00-00-00-00-00-00 0.0000000000000000E+000
2 00-00-00-00-00-00-F0-3F 1.0000000000000000E+000
10 00-00-00-00-00-E0-6F-40 2.5500000000000000E+002
18 00-00-E0-FF-FF-FF-EF-41 4.2949672950000000E+009
26 00-00-00-00-00-00-70-3F 3.9062500000000000E-003
34 00-00-00-00-00-00-F0-3D 2.3283064365386963E-010
42 DF-88-1E-1C-FE-74-AA-01 1.2345678901234500E-300
50 FA-59-8C-42-CA-C0-F3-3F 1.2345678901234565E+000
58 FB-59-8C-42-CA-C0-F3-3F 1.2345678901234567E+000
66 FC-59-8C-42-CA-C0-F3-3F 1.2345678901234569E+000
74 52-D3-BB-BC-E8-7E-3D-7E 1.2345678901234569E+300
82 FF-FF-FF-FF-FF-FF-EF-FF -1.7976931348623157E+308
89 FF-FF-FF-FF-FF-FF-EF-7F 1.7976931348623157E+308
97 01-00-00-00-00-00-00-00 4.9406564584124654E-324
99 00-00-00-00-00-00-F8-FF NaN
107 00-00-00-00-00-00-F0-FF -Infinity
115 00-00-00-00-00-00-F0-7F Infinity
*/
// Example of the BitConverter.ToDouble method.
using System;
class BytesToDoubleDemo
{
const string formatter = "{0,5}{1,27}{2,27:E16}";
// Convert eight byte array elements to a double and display it.
public static void BAToDouble( byte[ ] bytes, int index )
{
double value = BitConverter.ToDouble( bytes, index );
Console.WriteLine( formatter, index,
BitConverter.ToString( bytes, index, 8 ), value );
}
// Display a byte array, using multiple lines if necessary.
public static void WriteMultiLineByteArray( byte[ ] bytes )
{
const int rowSize = 20;
int iter;
Console.WriteLine( "initial byte array" );
Console.WriteLine( "------------------" );
for( iter = 0; iter < bytes.Length - rowSize; iter += rowSize )
{
Console.Write(
BitConverter.ToString( bytes, iter, rowSize ) );
Console.WriteLine( "-" );
}
Console.WriteLine( BitConverter.ToString( bytes, iter ) );
Console.WriteLine( );
}
public static void Main( )
{
byte[ ] byteArray = {
0, 0, 0, 0, 0, 0, 0, 0, 240, 63,
0, 0, 0, 0, 0, 224, 111, 64, 0, 0,
224, 255, 255, 255, 239, 65, 0, 0, 0, 0,
0, 0, 112, 63, 0, 0, 0, 0, 0, 0,
240, 61, 223, 136, 30, 28, 254, 116, 170, 1,
250, 89, 140, 66, 202, 192, 243, 63, 251, 89,
140, 66, 202, 192, 243, 63, 252, 89, 140, 66,
202, 192, 243, 63, 82, 211, 187, 188, 232, 126,
61, 126, 255, 255, 255, 255, 255, 255, 239, 255,
255, 255, 255, 255, 255, 239, 127, 1, 0, 0,
0, 0, 0, 0, 0, 248, 255, 0, 0, 0,
0, 0, 0, 240, 255, 0, 0, 0, 0, 0,
0, 240, 127 };
Console.WriteLine(
"This example of the BitConverter.ToDouble( byte[ ], " +
"int ) \nmethod generates the following output. It " +
"converts elements \nof a byte array to double values.\n" );
WriteMultiLineByteArray( byteArray );
Console.WriteLine( formatter, "index", "array elements",
"double" );
Console.WriteLine( formatter, "-----", "--------------",
"------" );
// Convert byte array elements to double values.
BAToDouble( byteArray, 0 );
BAToDouble( byteArray, 2 );
BAToDouble( byteArray, 10 );
BAToDouble( byteArray, 18 );
BAToDouble( byteArray, 26 );
BAToDouble( byteArray, 34 );
BAToDouble( byteArray, 42 );
BAToDouble( byteArray, 50 );
BAToDouble( byteArray, 58 );
BAToDouble( byteArray, 66 );
BAToDouble( byteArray, 74 );
BAToDouble( byteArray, 82 );
BAToDouble( byteArray, 89 );
BAToDouble( byteArray, 97 );
BAToDouble( byteArray, 99 );
BAToDouble( byteArray, 107 );
BAToDouble( byteArray, 115 );
}
}
/*
This example of the BitConverter.ToDouble( byte[ ], int )
method generates the following output. It converts elements
of a byte array to double values.
initial byte array
------------------
00-00-00-00-00-00-00-00-F0-3F-00-00-00-00-00-E0-6F-40-00-00-
E0-FF-FF-FF-EF-41-00-00-00-00-00-00-70-3F-00-00-00-00-00-00-
F0-3D-DF-88-1E-1C-FE-74-AA-01-FA-59-8C-42-CA-C0-F3-3F-FB-59-
8C-42-CA-C0-F3-3F-FC-59-8C-42-CA-C0-F3-3F-52-D3-BB-BC-E8-7E-
3D-7E-FF-FF-FF-FF-FF-FF-EF-FF-FF-FF-FF-FF-FF-EF-7F-01-00-00-
00-00-00-00-00-F8-FF-00-00-00-00-00-00-F0-FF-00-00-00-00-00-
00-F0-7F
index array elements double
----- -------------- ------
0 00-00-00-00-00-00-00-00 0.0000000000000000E+000
2 00-00-00-00-00-00-F0-3F 1.0000000000000000E+000
10 00-00-00-00-00-E0-6F-40 2.5500000000000000E+002
18 00-00-E0-FF-FF-FF-EF-41 4.2949672950000000E+009
26 00-00-00-00-00-00-70-3F 3.9062500000000000E-003
34 00-00-00-00-00-00-F0-3D 2.3283064365386963E-010
42 DF-88-1E-1C-FE-74-AA-01 1.2345678901234500E-300
50 FA-59-8C-42-CA-C0-F3-3F 1.2345678901234565E+000
58 FB-59-8C-42-CA-C0-F3-3F 1.2345678901234567E+000
66 FC-59-8C-42-CA-C0-F3-3F 1.2345678901234569E+000
74 52-D3-BB-BC-E8-7E-3D-7E 1.2345678901234569E+300
82 FF-FF-FF-FF-FF-FF-EF-FF -1.7976931348623157E+308
89 FF-FF-FF-FF-FF-FF-EF-7F 1.7976931348623157E+308
97 01-00-00-00-00-00-00-00 4.9406564584124654E-324
99 00-00-00-00-00-00-F8-FF NaN
107 00-00-00-00-00-00-F0-FF -Infinity
115 00-00-00-00-00-00-F0-7F Infinity
*/
open System
let print obj1 obj2 obj3 = printfn $"{obj1,5}{obj2,27}{obj3,27:E16}"
// Convert eight byte array elements to a double and display it.
let BAToDouble bytes index =
let value = BitConverter.ToDouble(bytes, index)
print index (BitConverter.ToString(bytes, index, 8)) value
// Display a byte array, using multiple lines if necessary.
let writeMultiLineByteArray (bytes: byte []) =
let rowSize = 20
printfn "initial byte array"
printfn "------------------"
let mutable iter = 0
for i in 0 .. rowSize .. (bytes.Length - rowSize - 1) do
printfn $"{BitConverter.ToString(bytes, iter, rowSize)}-"
iter <- i
printfn $"{BitConverter.ToString(bytes, iter + rowSize)}\n"
let byteArray =
[| 0uy; 0uy; 0uy; 0uy; 0uy; 0uy; 0uy; 0uy; 240uy; 63uy
0uy; 0uy; 0uy; 0uy; 0uy; 224uy; 111uy; 64uy; 0uy; 0uy;
224uy; 255uy; 255uy; 255uy; 239uy; 65uy; 0uy; 0uy; 0uy; 0uy
0uy; 0uy; 112uy; 63uy; 0uy; 0uy; 0uy; 0uy; 0uy; 0uy
240uy; 61uy; 223uy; 136uy; 30uy; 28uy; 254uy; 116uy; 170uy; 1uy
250uy; 89uy; 140uy; 66uy; 202uy; 192uy; 243uy; 63uy; 251uy; 89uy
140uy; 66uy; 202uy; 192uy; 243uy; 63uy; 252uy; 89uy; 140uy; 66uy
202uy; 192uy; 243uy; 63uy; 82uy; 211uy; 187uy; 188uy; 232uy; 126uy
61uy; 126uy; 255uy; 255uy; 255uy; 255uy; 255uy; 255uy; 239uy; 255uy
255uy; 255uy; 255uy; 255uy; 255uy; 239uy; 127uy; 1uy; 0uy; 0uy
0uy; 0uy; 0uy; 0uy; 0uy; 248uy; 255uy; 0uy; 0uy; 0uy
0uy; 0uy; 0uy; 240uy; 255uy; 0uy; 0uy; 0uy; 0uy; 0uy
0uy; 240uy; 127uy |]
printfn "This example of the BitConverter.ToDouble(byte [], int) \nmethod generates the following output. It converts elements \nof a byte array to double values.\n"
writeMultiLineByteArray byteArray
print "index" "array elements" "double"
print "-----" "--------------" "------"
// Convert byte array elements to double values.
BAToDouble byteArray 0
BAToDouble byteArray 2
BAToDouble byteArray 10
BAToDouble byteArray 18
BAToDouble byteArray 26
BAToDouble byteArray 34
BAToDouble byteArray 42
BAToDouble byteArray 50
BAToDouble byteArray 58
BAToDouble byteArray 66
BAToDouble byteArray 74
BAToDouble byteArray 82
BAToDouble byteArray 89
BAToDouble byteArray 97
BAToDouble byteArray 99
BAToDouble byteArray 107
BAToDouble byteArray 115
// This example of the BitConverter.ToDouble(byte [], int )
// method generates the following output. It converts elements
// of a byte array to double values.
// initial byte array
// ------------------
// 00-00-00-00-00-00-00-00-F0-3F-00-00-00-00-00-E0-6F-40-00-00-
// 00-00-00-00-00-00-00-00-F0-3F-00-00-00-00-00-E0-6F-40-00-00-
// E0-FF-FF-FF-EF-41-00-00-00-00-00-00-70-3F-00-00-00-00-00-00-
// F0-3D-DF-88-1E-1C-FE-74-AA-01-FA-59-8C-42-CA-C0-F3-3F-FB-59-
// 8C-42-CA-C0-F3-3F-FC-59-8C-42-CA-C0-F3-3F-52-D3-BB-BC-E8-7E-
// 3D-7E-FF-FF-FF-FF-FF-FF-EF-FF-FF-FF-FF-FF-FF-EF-7F-01-00-00-
// 00-F0-7F
//
// index array elements double
// ----- -------------- ------
// 0 00-00-00-00-00-00-00-00 0.0000000000000000E+000
// 2 00-00-00-00-00-00-F0-3F 1.0000000000000000E+000
// 10 00-00-00-00-00-E0-6F-40 2.5500000000000000E+002
// 18 00-00-E0-FF-FF-FF-EF-41 4.2949672950000000E+009
// 26 00-00-00-00-00-00-70-3F 3.9062500000000000E-003
// 34 00-00-00-00-00-00-F0-3D 2.3283064365386963E-010
// 42 DF-88-1E-1C-FE-74-AA-01 1.2345678901234500E-300
// 50 FA-59-8C-42-CA-C0-F3-3F 1.2345678901234565E+000
// 58 FB-59-8C-42-CA-C0-F3-3F 1.2345678901234567E+000
// 66 FC-59-8C-42-CA-C0-F3-3F 1.2345678901234569E+000
// 74 52-D3-BB-BC-E8-7E-3D-7E 1.2345678901234569E+300
// 82 FF-FF-FF-FF-FF-FF-EF-FF -1.7976931348623157E+308
// 89 FF-FF-FF-FF-FF-FF-EF-7F 1.7976931348623157E+308
// 97 01-00-00-00-00-00-00-00 4.9406564584124654E-324
// 99 00-00-00-00-00-00-F8-FF NaN
// 107 00-00-00-00-00-00-F0-FF -∞
// 115 00-00-00-00-00-00-F0-7F ∞
' Example of the BitConverter.ToDouble method.
Module BytesToDoubleDemo
Const formatter As String = "{0,5}{1,27}{2,27:E16}"
' Convert eight Byte array elements to a Double and display it.
Sub BAToDouble( bytes( ) As Byte, index As Integer )
Dim value As Double = BitConverter.ToDouble( bytes, index )
Console.WriteLine( formatter, index, _
BitConverter.ToString( bytes, index, 8 ), value )
End Sub
' Display a Byte array, using multiple lines if necessary.
Sub WriteMultiLineByteArray( bytes( ) As Byte )
Const rowSize As Integer = 20
Dim iter As Integer
Console.WriteLine( "initial Byte array" )
Console.WriteLine( "------------------" )
For iter = 0 To bytes.Length - rowSize - 1 Step rowSize
Console.Write( _
BitConverter.ToString( bytes, iter, rowSize ) )
Console.WriteLine( "-" )
Next iter
Console.WriteLine( BitConverter.ToString( bytes, iter ) )
Console.WriteLine( )
End Sub
Sub Main( )
Dim byteArray as Byte( ) = { _
0, 0, 0, 0, 0, 0, 0, 0, 240, 63, _
0, 0, 0, 0, 0, 224, 111, 64, 0, 0, _
224, 255, 255, 255, 239, 65, 0, 0, 0, 0, _
0, 0, 112, 63, 0, 0, 0, 0, 0, 0, _
240, 61, 223, 136, 30, 28, 254, 116, 170, 1, _
250, 89, 140, 66, 202, 192, 243, 63, 251, 89, _
140, 66, 202, 192, 243, 63, 252, 89, 140, 66, _
202, 192, 243, 63, 82, 211, 187, 188, 232, 126, _
61, 126, 255, 255, 255, 255, 255, 255, 239, 255, _
255, 255, 255, 255, 255, 239, 127, 1, 0, 0, _
0, 0, 0, 0, 0, 248, 255, 0, 0, 0, _
0, 0, 0, 240, 255, 0, 0, 0, 0, 0, _
0, 240, 127 }
Console.WriteLine( _
"This example of the BitConverter.ToDouble( Byte( ), " & _
"Integer ) " & vbCrLf & "method generates the " & _
"following output. It converts elements " & vbCrLf & _
"of a Byte array to Double values." & vbCrLf )
WriteMultiLineByteArray( byteArray )
Console.WriteLine( formatter, "index", "array elements", _
"Double" )
Console.WriteLine( formatter, "-----", "--------------", _
"------" )
' Convert Byte array elements to Double values.
BAToDouble( byteArray, 0 )
BAToDouble( byteArray, 2 )
BAToDouble( byteArray, 10 )
BAToDouble( byteArray, 18 )
BAToDouble( byteArray, 26 )
BAToDouble( byteArray, 34 )
BAToDouble( byteArray, 42 )
BAToDouble( byteArray, 50 )
BAToDouble( byteArray, 58 )
BAToDouble( byteArray, 66 )
BAToDouble( byteArray, 74 )
BAToDouble( byteArray, 82 )
BAToDouble( byteArray, 89 )
BAToDouble( byteArray, 97 )
BAToDouble( byteArray, 99 )
BAToDouble( byteArray, 107 )
BAToDouble( byteArray, 115 )
End Sub
End Module
' This example of the BitConverter.ToDouble( Byte( ), Integer )
' method generates the following output. It converts elements
' of a Byte array to Double values.
'
' initial Byte array
' ------------------
' 00-00-00-00-00-00-00-00-F0-3F-00-00-00-00-00-E0-6F-40-00-00-
' E0-FF-FF-FF-EF-41-00-00-00-00-00-00-70-3F-00-00-00-00-00-00-
' F0-3D-DF-88-1E-1C-FE-74-AA-01-FA-59-8C-42-CA-C0-F3-3F-FB-59-
' 8C-42-CA-C0-F3-3F-FC-59-8C-42-CA-C0-F3-3F-52-D3-BB-BC-E8-7E-
' 3D-7E-FF-FF-FF-FF-FF-FF-EF-FF-FF-FF-FF-FF-FF-EF-7F-01-00-00-
' 00-00-00-00-00-F8-FF-00-00-00-00-00-00-F0-FF-00-00-00-00-00-
' 00-F0-7F
'
' index array elements Double
' ----- -------------- ------
' 0 00-00-00-00-00-00-00-00 0.0000000000000000E+000
' 2 00-00-00-00-00-00-F0-3F 1.0000000000000000E+000
' 10 00-00-00-00-00-E0-6F-40 2.5500000000000000E+002
' 18 00-00-E0-FF-FF-FF-EF-41 4.2949672950000000E+009
' 26 00-00-00-00-00-00-70-3F 3.9062500000000000E-003
' 34 00-00-00-00-00-00-F0-3D 2.3283064365386963E-010
' 42 DF-88-1E-1C-FE-74-AA-01 1.2345678901234500E-300
' 50 FA-59-8C-42-CA-C0-F3-3F 1.2345678901234565E+000
' 58 FB-59-8C-42-CA-C0-F3-3F 1.2345678901234567E+000
' 66 FC-59-8C-42-CA-C0-F3-3F 1.2345678901234569E+000
' 74 52-D3-BB-BC-E8-7E-3D-7E 1.2345678901234569E+300
' 82 FF-FF-FF-FF-FF-FF-EF-FF -1.7976931348623157E+308
' 89 FF-FF-FF-FF-FF-FF-EF-7F 1.7976931348623157E+308
' 97 01-00-00-00-00-00-00-00 4.9406564584124654E-324
' 99 00-00-00-00-00-00-F8-FF NaN
' 107 00-00-00-00-00-00-F0-FF -Infinity
' 115 00-00-00-00-00-00-F0-7F Infinity
설명
이 메서드는 ToDouble 바이트를 인덱 startIndex
스에서 + 7로 startIndex
값으로 Double 변환합니다. 배열의 바이트 순서는 컴퓨터 시스템 아키텍처의 엔디언성을 반영해야 합니다. 자세한 내용은 클래스 항목의 설명 섹션을 BitConverter 참조하세요.