BigInteger.Equals 方法

定义

命名空间:: System.Numerics

程序集:: System.Numerics.dll, System.Runtime.Numerics.dll

程序集:: System.Numerics.dll

程序集:: System.Runtime.Numerics.dll

程序集:: netstandard.dll

重要

一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。

返回一个值，该值指示两个数值是否相等。

重载

名称	说明
Equals(Int64)	返回一个值，该值指示当前实例和有符号的 64 位整数是否具有相同的值。
Equals(BigInteger)	返回一个值，该值指示当前实例和指定 BigInteger 对象是否具有相同的值。
Equals(Object)	返回一个值，该值指示当前实例和指定对象是否具有相同的值。
Equals(UInt64)	返回一个值，该值指示当前实例和无符号 64 位整数是否具有相同的值。

Equals(Int64)

返回一个值，该值指示当前实例和有符号的 64 位整数是否具有相同的值。

public:
 bool Equals(long other);

public bool Equals(long other);

override this.Equals : int64 -> bool

Public Function Equals (other As Long) As Boolean

参数

other: Int64

要比较的有符号 64 位整数值。

Boolean

true 如果有符号的 64 位整数和当前实例具有相同的值，则为 ;否则，为 false.

示例

以下示例实例化 BigInteger 除每个 UInt64整型以外的每个整型对象。然后，它会调用Equals(Int64)该方法以将值与传递给BigInteger构造函数的原始整数值进行比较BigInteger。如输出所示，每个事例中的值相等。

BigInteger bigIntValue;

byte byteValue = 16;
bigIntValue = new BigInteger(byteValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  byteValue.GetType().Name, byteValue,
                  bigIntValue.Equals(byteValue));

sbyte sbyteValue = -16;
bigIntValue = new BigInteger(sbyteValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  sbyteValue.GetType().Name, sbyteValue,
                  bigIntValue.Equals(sbyteValue));

short shortValue = 1233;
bigIntValue = new BigInteger(shortValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  shortValue.GetType().Name, shortValue,
                  bigIntValue.Equals(shortValue));

ushort ushortValue = 64000;
bigIntValue = new BigInteger(ushortValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  ushortValue.GetType().Name, ushortValue,
                  bigIntValue.Equals(ushortValue));

int intValue = -1603854;
bigIntValue = new BigInteger(intValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  intValue.GetType().Name, intValue,
                  bigIntValue.Equals(intValue));

uint uintValue = 1223300;
bigIntValue = new BigInteger(uintValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  uintValue.GetType().Name, uintValue,
                  bigIntValue.Equals(uintValue));

long longValue = -123822229012;
bigIntValue = new BigInteger(longValue);
Console.WriteLine("{0} {1} = {2} {3} : {4}",
                  bigIntValue.GetType().Name, bigIntValue,
                  longValue.GetType().Name, longValue,
                  bigIntValue.Equals(longValue));
// The example displays the following output:
//    BigInteger 16 = Byte 16 : True
//    BigInteger -16 = SByte -16 : True
//    BigInteger 1233 = Int16 1233 : True
//    BigInteger 64000 = UInt16 64000 : True
//    BigInteger -1603854 = Int32 -1603854 : True
//    BigInteger 1223300 = UInt32 1223300 : True
//    BigInteger -123822229012 = Int64 -123822229012 : True

let byteValue = 16uy
let bigIntValue = BigInteger byteValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {byteValue.GetType().Name} {byteValue} : {bigIntValue.Equals(byteValue)}"

let sbyteValue = -16y
let bigIntValue = BigInteger sbyteValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {sbyteValue.GetType().Name} {sbyteValue} : {bigIntValue.Equals(sbyteValue)}"

let shortValue = 1233s
let bigIntValue = BigInteger shortValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {shortValue.GetType().Name} {shortValue} : {bigIntValue.Equals(shortValue)}"

let ushortValue = 64000us
let bigIntValue = BigInteger ushortValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {ushortValue.GetType().Name} {ushortValue} : {bigIntValue.Equals(ushortValue)}"

let intValue = -1603854
let bigIntValue = BigInteger intValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {intValue.GetType().Name} {intValue} : {bigIntValue.Equals(intValue)}"

let uintValue = 1223300u
let bigIntValue = BigInteger uintValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {uintValue.GetType().Name} {uintValue} : {bigIntValue.Equals(uintValue)}"

let longValue = -123822229012L
let bigIntValue = BigInteger longValue

printfn
    $"{bigIntValue.GetType().Name} {bigIntValue} = {longValue.GetType().Name} {longValue} : {bigIntValue.Equals(longValue)}"
// The example displays the following output:
//    BigInteger 16 = Byte 16 : True
//    BigInteger -16 = SByte -16 : True
//    BigInteger 1233 = Int16 1233 : True
//    BigInteger 64000 = UInt16 64000 : True
//    BigInteger -1603854 = Int32 -1603854 : True
//    BigInteger 1223300 = UInt32 1223300 : True
//    BigInteger -123822229012 = Int64 -123822229012 : True

Dim bigIntValue As BigInteger 

Dim byteValue As Byte = 16
bigIntValue = New BigInteger(byteValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  byteValue.GetType().Name, byteValue, 
                  bigIntValue.Equals(byteValue))
                  
Dim sbyteValue As SByte = -16
bigIntValue = New BigInteger(sbyteValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  sbyteValue.GetType().Name, sbyteValue,
                  bigIntValue.Equals(sbyteValue))

Dim shortValue As Short = 1233
bigIntValue = New BigInteger(shortValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  shortValue.GetType().Name, shortValue, 
                  bigIntValue.Equals(shortValue))
      
Dim ushortValue As UShort = 64000
bigIntValue = New BigInteger(ushortValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  ushortValue.GetType().Name, ushortValue, 
                  bigIntValue.Equals(ushortValue))

Dim intValue As Integer = -1603854
bigIntValue = New BigInteger(intValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  intValue.GetType().Name, intValue, 
                  bigIntValue.Equals(intValue))

Dim uintValue As UInteger = 1223300
bigIntValue = New BigInteger(uintValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  uintValue.GetType().Name, uintValue, 
                  bigIntValue.Equals(uintValue))

Dim longValue As Long = -123822229012
bigIntValue = New BigInteger(longValue)
Console.WriteLine("{0} {1} = {2} {3} : {4}", 
                  bigIntValue.GetType().Name, bigIntValue,
                  longValue.GetType().Name, longValue, 
                  bigIntValue.Equals(longValue))
' The example displays the following output:
'    BigInteger 16 = Byte 16 : True
'    BigInteger -16 = SByte -16 : True
'    BigInteger 1233 = Int16 1233 : True
'    BigInteger 64000 = UInt16 64000 : True
'    BigInteger -1603854 = Int32 -1603854 : True
'    BigInteger 1223300 = UInt32 1223300 : True
'    BigInteger -123822229012 = Int64 -123822229012 : True

注解

如果是other一个Byte、Int16、Int32、SByte或UInt16 UInt32值，则调用该方法时，它将隐式转换为值Int64。

若要确定两个对象之间的关系，而不是只是测试相等性，请调用该方法 BigInteger.CompareTo(Int64) 。

适用于

Equals(BigInteger)

返回一个值，该值指示当前实例和指定 BigInteger 对象是否具有相同的值。

public:
 virtual bool Equals(System::Numerics::BigInteger other);

public bool Equals(System.Numerics.BigInteger other);

override this.Equals : System.Numerics.BigInteger -> bool

Public Function Equals (other As BigInteger) As Boolean

参数

other: BigInteger

要比较的对象。

Boolean

如果此对象具有相同的值，则为 />;否则为。

实现

Equals(T)

示例

下面的示例比较了几颗恒星与地球的埃普西隆·英迪与地球距离的近似距离，以确定它们是否相等。该示例使用该方法的每个重载 Equals 来测试是否相等。

const long LIGHT_YEAR = 5878625373183;

BigInteger altairDistance = 17 * LIGHT_YEAR;
BigInteger epsilonIndiDistance = 12 * LIGHT_YEAR;
BigInteger ursaeMajoris47Distance = 46 * LIGHT_YEAR;
long tauCetiDistance = 12 * LIGHT_YEAR;
ulong procyon2Distance = 12 * LIGHT_YEAR;
object wolf424ABDistance = 14 * LIGHT_YEAR;

Console.WriteLine("Approx. equal distances from Epsilon Indi to:");
Console.WriteLine("   Altair: {0}",
                  epsilonIndiDistance.Equals(altairDistance));
Console.WriteLine("   Ursae Majoris 47: {0}",
                  epsilonIndiDistance.Equals(ursaeMajoris47Distance));
Console.WriteLine("   TauCeti: {0}",
                  epsilonIndiDistance.Equals(tauCetiDistance));
Console.WriteLine("   Procyon 2: {0}",
                  epsilonIndiDistance.Equals(procyon2Distance));
Console.WriteLine("   Wolf 424 AB: {0}",
                  epsilonIndiDistance.Equals(wolf424ABDistance));
// The example displays the following output:
//    Approx. equal distances from Epsilon Indi to:
//       Altair: False
//       Ursae Majoris 47: False
//       TauCeti: True
//       Procyon 2: True
//       Wolf 424 AB: False

let LIGHT_YEAR = 5878625373183L

let altairDistance = 17I * bigint LIGHT_YEAR
let epsilonIndiDistance = 12I * bigint LIGHT_YEAR
let ursaeMajoris47Distance = 46I * bigint LIGHT_YEAR
let tauCetiDistance = 12L * LIGHT_YEAR
let procyon2Distance = 12uL * uint64 LIGHT_YEAR
let wolf424ABDistance = 14L * LIGHT_YEAR

printfn "Approx. equal distances from Epsilon Indi to:"
printfn $"   Altair: {epsilonIndiDistance.Equals(altairDistance)}"
printfn $"   Ursae Majoris 47: {epsilonIndiDistance.Equals(ursaeMajoris47Distance)}"
printfn $"   TauCeti: {epsilonIndiDistance.Equals(tauCetiDistance)}"
printfn $"   Procyon 2: {epsilonIndiDistance.Equals(procyon2Distance)}"
printfn $"   Wolf 424 AB: {epsilonIndiDistance.Equals(wolf424ABDistance)}"
// The example displays the following output:
//    Approx. equal distances from Epsilon Indi to:
//       Altair: False
//       Ursae Majoris 47: False
//       TauCeti: True
//       Procyon 2: True
//       Wolf 424 AB: False

   Const LIGHT_YEAR As Long = 5878625373183

   Dim altairDistance As BigInteger = 17 * LIGHT_YEAR
   Dim epsilonIndiDistance As BigInteger = 12 * LIGHT_YEAR
   Dim ursaeMajoris47Distance As BigInteger = 46 * LIGHT_YEAR
   Dim tauCetiDistance As BigInteger = 12 * LIGHT_YEAR
   Dim procyon2Distance As Long = 12 * LIGHT_YEAR
   Dim wolf424ABDistance As Object = 14 * LIGHT_YEAR
   
   Console.WriteLine("Approx. equal distances from Epsilon Indi to:")
   Console.WriteLine("   Altair: {0}", _
                     epsilonIndiDistance.Equals(altairDistance))
   Console.WriteLine("   Ursae Majoris 47: {0}", _
                     epsilonIndiDistance.Equals(ursaeMajoris47Distance))
   Console.WriteLine("   TauCeti: {0}", _
                     epsilonIndiDistance.Equals(tauCetiDistance))
   Console.WriteLine("   Procyon 2: {0}", _
                     epsilonIndiDistance.Equals(procyon2Distance))
   Console.WriteLine("   Wolf 424 AB: {0}", _
                     epsilonIndiDistance.Equals(wolf424ABDistance))
   ' The example displays the following output:
   '    Approx. equal distances from Epsilon Indi to:
   '       Altair: False
   '       Ursae Majoris 47: False
   '       TauCeti: True
   '       Procyon 2: True
   '       Wolf 424 AB: False

注解

此方法实现 IEquatable<T> 接口并执行得略好 Equals(Object) ，因为它不必将 other 参数转换为 BigInteger 对象。

若要确定两 BigInteger 个对象之间的关系，而不是只是测试相等性，请调用该方法 BigInteger.CompareTo(BigInteger) 。

适用于

Equals(Object)

返回一个值，该值指示当前实例和指定对象是否具有相同的值。

public:
 override bool Equals(System::Object ^ obj);

public override bool Equals(object obj);

override this.Equals : obj -> bool

Public Overrides Function Equals (obj As Object) As Boolean

参数

obj: Object

要比较的对象。

Boolean

true obj如果参数是对象BigInteger，并且其值等于当前BigInteger实例的值，则为 ;否则为 false。

示例

以下示例定义并行 Object 和 BigInteger 数组。一个数组的每个元素的值与第二个数组的相应元素具有相同的值。如示例中的输出所示，仅当数组中的实例BigInteger为 a BigInteger 且其值相等时，数组中的实例才被视为等于数组中的Object实例。

using System;
using System.Numerics;

public class Example
{
   public static void Main()
   {
      object[] obj = { 0, 10, 100, new BigInteger(1000), -10 };
      BigInteger[] bi = { BigInteger.Zero, new BigInteger(10),
                          new BigInteger(100), new BigInteger(1000),
                          new BigInteger(-10) };
      for (int ctr = 0; ctr < bi.Length; ctr++)
         Console.WriteLine(bi[ctr].Equals(obj[ctr]));
   }
}
// The example displays the following output:
//       False
//       False
//       False
//       True
//       False

open System.Numerics

let obj: obj[] = [| 0; 10; 100; BigInteger 1000; -10 |]

let bi =
    [| BigInteger.Zero
       BigInteger 10
       BigInteger 100
       BigInteger 1000
       BigInteger -10 |]

for ctr = 0 to bi.Length - 1 do
    printfn $"{bi.[ctr].Equals(obj.[ctr])}"
// The example displays the following output:
//       False
//       False
//       False
//       True
//       False

Imports System.Numerics

Module Example
   Public Sub Main()
      Dim obj() As object = { 0, 10, 100, New BigInteger(1000), -10 }
      Dim bi() As BigInteger = { BigInteger.Zero, New BigInteger(10),
                                 New BigInteger(100), New BigInteger(1000),
                                 New BigInteger(-10) }
      For ctr As Integer = 0 To bi.Length - 1
         Console.WriteLine(bi(ctr).Equals(obj(ctr)))
      Next                           
   End Sub
End Module
' The example displays the following output:
'       False
'       False
'       False
'       True
'       False

注解

obj如果参数不是值BigInteger，该方法将false返回。仅当值为BigInteger等于当前实例的实例时obj，该方法才返回true。

若要确定两个对象之间的关系，而不是只是测试相等性，请调用该方法 CompareTo(Object) 。

适用于

Equals(UInt64)

重要

此 API 不符合 CLS。

返回一个值，该值指示当前实例和无符号 64 位整数是否具有相同的值。

public:
 bool Equals(System::UInt64 other);

[System.CLSCompliant(false)]
public bool Equals(ulong other);

[<System.CLSCompliant(false)>]
override this.Equals : uint64 -> bool

Public Function Equals (other As ULong) As Boolean

参数

other: UInt64

要比较的无符号 64 位整数。

Boolean

true 如果当前实例和无符号 64 位整数具有相同的值，则为 ;否则，为 false.

属性: CLSCompliantAttribute

示例

const long LIGHT_YEAR = 5878625373183;

BigInteger altairDistance = 17 * LIGHT_YEAR;
BigInteger epsilonIndiDistance = 12 * LIGHT_YEAR;
BigInteger ursaeMajoris47Distance = 46 * LIGHT_YEAR;
long tauCetiDistance = 12 * LIGHT_YEAR;
ulong procyon2Distance = 12 * LIGHT_YEAR;
object wolf424ABDistance = 14 * LIGHT_YEAR;

Console.WriteLine("Approx. equal distances from Epsilon Indi to:");
Console.WriteLine("   Altair: {0}",
                  epsilonIndiDistance.Equals(altairDistance));
Console.WriteLine("   Ursae Majoris 47: {0}",
                  epsilonIndiDistance.Equals(ursaeMajoris47Distance));
Console.WriteLine("   TauCeti: {0}",
                  epsilonIndiDistance.Equals(tauCetiDistance));
Console.WriteLine("   Procyon 2: {0}",
                  epsilonIndiDistance.Equals(procyon2Distance));
Console.WriteLine("   Wolf 424 AB: {0}",
                  epsilonIndiDistance.Equals(wolf424ABDistance));
// The example displays the following output:
//    Approx. equal distances from Epsilon Indi to:
//       Altair: False
//       Ursae Majoris 47: False
//       TauCeti: True
//       Procyon 2: True
//       Wolf 424 AB: False

let LIGHT_YEAR = 5878625373183L

let altairDistance = 17I * bigint LIGHT_YEAR
let epsilonIndiDistance = 12I * bigint LIGHT_YEAR
let ursaeMajoris47Distance = 46I * bigint LIGHT_YEAR
let tauCetiDistance = 12L * LIGHT_YEAR
let procyon2Distance = 12uL * uint64 LIGHT_YEAR
let wolf424ABDistance = 14L * LIGHT_YEAR

printfn "Approx. equal distances from Epsilon Indi to:"
printfn $"   Altair: {epsilonIndiDistance.Equals(altairDistance)}"
printfn $"   Ursae Majoris 47: {epsilonIndiDistance.Equals(ursaeMajoris47Distance)}"
printfn $"   TauCeti: {epsilonIndiDistance.Equals(tauCetiDistance)}"
printfn $"   Procyon 2: {epsilonIndiDistance.Equals(procyon2Distance)}"
printfn $"   Wolf 424 AB: {epsilonIndiDistance.Equals(wolf424ABDistance)}"
// The example displays the following output:
//    Approx. equal distances from Epsilon Indi to:
//       Altair: False
//       Ursae Majoris 47: False
//       TauCeti: True
//       Procyon 2: True
//       Wolf 424 AB: False

   Const LIGHT_YEAR As Long = 5878625373183

   Dim altairDistance As BigInteger = 17 * LIGHT_YEAR
   Dim epsilonIndiDistance As BigInteger = 12 * LIGHT_YEAR
   Dim ursaeMajoris47Distance As BigInteger = 46 * LIGHT_YEAR
   Dim tauCetiDistance As BigInteger = 12 * LIGHT_YEAR
   Dim procyon2Distance As Long = 12 * LIGHT_YEAR
   Dim wolf424ABDistance As Object = 14 * LIGHT_YEAR
   
   Console.WriteLine("Approx. equal distances from Epsilon Indi to:")
   Console.WriteLine("   Altair: {0}", _
                     epsilonIndiDistance.Equals(altairDistance))
   Console.WriteLine("   Ursae Majoris 47: {0}", _
                     epsilonIndiDistance.Equals(ursaeMajoris47Distance))
   Console.WriteLine("   TauCeti: {0}", _
                     epsilonIndiDistance.Equals(tauCetiDistance))
   Console.WriteLine("   Procyon 2: {0}", _
                     epsilonIndiDistance.Equals(procyon2Distance))
   Console.WriteLine("   Wolf 424 AB: {0}", _
                     epsilonIndiDistance.Equals(wolf424ABDistance))
   ' The example displays the following output:
   '    Approx. equal distances from Epsilon Indi to:
   '       Altair: False
   '       Ursae Majoris 47: False
   '       TauCeti: True
   '       Procyon 2: True
   '       Wolf 424 AB: False

注解

若要确定两个对象之间的关系，而不是只是测试相等性，请调用该方法 BigInteger.CompareTo(UInt64) 。

适用于

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