BigInteger.Compare(BigInteger, BigInteger) 方法

定义

命名空间:

System.Numerics

程序集:

System.Runtime.Numerics.dll

Source:

BigInteger.cs

比较两个 BigInteger 值，并返回一个整数，该整数指示第一个值是小于、等于还是大于第二个值。

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

参数

left

BigInteger

要比较的第一个值。

right

BigInteger

要比较的第二个值。

返回

Int32

一个有符号整数，指示 left 和 right 的相对值，如下表所示。

值	条件
小于零	left 小于 right。
零	left 等于 right。
大于零	left 大于 right。

注解

虽然 类型 BigInteger 没有固定范围，但值的比较 BigInteger 并不以浮点数比较特征的精度不足为特征。 以下示例比较两 BigInteger 个值，它们相差 1，并且每个值都有 1,896 位数字。 方法 Compare 正确报告这两个值不相等。

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

另请参阅

• CompareTo