BigInteger.Compare(BigInteger, BigInteger) 方法

定義

命名空間:

System.Numerics

組件:

System.Runtime.Numerics.dll

來源:

BigInteger.cs

比較兩個 BigInteger 值並傳回整數，這個整數表示第一個值小於、等於或大於第二個值。

public:
 static int Compare(System::Numerics::BigInteger left, System::Numerics::BigInteger right);

public static int Compare (System.Numerics.BigInteger left, System.Numerics.BigInteger right);

static member Compare : System.Numerics.BigInteger * System.Numerics.BigInteger -> int

Public Shared Function Compare (left As BigInteger, right As BigInteger) As Integer

參數

left

BigInteger

要比較的第一個值。

right

BigInteger

要比較的第二個值。

傳回

Int32

帶正負號的整數，表示 left 和 right 的相對值，如下表所示。

值	條件
小於零	left 小於 right。
零	left等於 right。
大於零	left 大於 right。

備註

雖然此 BigInteger 類型沒有固定範圍，但值的比較 BigInteger 不是以浮點數比較為特徵的精確度所描述。 下列範例會比較兩 BigInteger 個不同值，每個值都有 1,896 位數。 方法 Compare 會正確報告兩個值不相等。

BigInteger number1 = BigInteger.Pow(Int64.MaxValue, 100);
BigInteger number2 = number1 + 1;
string relation = "";
switch (BigInteger.Compare(number1, number2))
{
   case -1:
      relation = "<";
      break;
   case 0:
      relation = "=";
      break;
   case 1:
      relation = ">";
      break;
}
Console.WriteLine("{0} {1} {2}", number1, relation, number2);
// The example displays the following output:
//    3.0829940252776347122742186219E+1896 < 3.0829940252776347122742186219E+1896

let number1 = BigInteger.Pow(int64 System.Int64.MaxValue, 100)
let number2 = number1 + 1I
let relation = 
    match BigInteger.Compare(number1, number2) with
    | -1 -> "<"
    | 0 -> "="
    | 1 | _ -> ">"

printfn $"{number1} {relation} {number2}"
// The example displays the following output:
//    3.0829940252776347122742186219E+1896 < 3.0829940252776347122742186219E+1896

Dim number1 As BigInteger = BigInteger.Pow(Int64.MaxValue, 100)
Dim number2 As BigInteger = number1 + 1
Dim relation As String = ""
Select Case BigInteger.Compare(number1, number2)
   Case -1
      relation = "<"
   Case 0
      relation = "="
   Case 1
      relation = ">"
End Select            
Console.WriteLine("{0} {1} {2}", number1, relation, number2)
' The example displays the following output:
'    3.0829940252776347122742186219E+1896 < 3.0829940252776347122742186219E+1896

另請參閱

• CompareTo