BigInteger.IComparable.CompareTo(Object) 方法

定义

命名空间:
System.Numerics
程序集:
System.Numerics.dll, System.Runtime.Numerics.dll
程序集:
System.Runtime.Numerics.dll

将此实例与指定的对象进行比较，并返回一个整数，该整数指示此实例的值是小于、等于还是大于指定对象的值。

 virtual int System.IComparable.CompareTo(System::Object ^ obj) = IComparable::CompareTo;
int IComparable.CompareTo(object obj);
abstract member System.IComparable.CompareTo : obj -> int
override this.System.IComparable.CompareTo : obj -> int
Function CompareTo (obj As Object) As Integer Implements IComparable.CompareTo

参数

obj
Object

要比较的对象。

返回

Int32

一个有符号整数，指示当前实例与 obj 参数的关系，如下表所示。

返回值 Description
小于零 当前实例小于 obj。
零 当前实例等于 obj。
大于零 当前实例大于 或 参数为 < a0 />。

实现

CompareTo(Object)

例外

ArgumentException

obj不是 .BigInteger

示例

以下示例调用 CompareTo(Object) 该方法将值与对象数组中的每个元素进行比较 BigInteger ：

object[] values = { BigInteger.Pow(Int64.MaxValue, 10), null,
                    12.534, Int64.MaxValue, BigInteger.One };
BigInteger number = UInt64.MaxValue;

foreach (object value in values)
{
   try {
      Console.WriteLine("Comparing {0} with '{1}': {2}", number, value,
                        number.CompareTo(value));
   }
   catch (ArgumentException) {
      Console.WriteLine("Unable to compare the {0} value {1} with a BigInteger.",
                        value.GetType().Name, value);
   }
}
// The example displays the following output:
//    Comparing 18446744073709551615 with '4.4555084156466750133735972424E+189': -1
//    Comparing 18446744073709551615 with '': 1
//    Unable to compare the Double value 12.534 with a BigInteger.
//    Unable to compare the Int64 value 9223372036854775807 with a BigInteger.
//    Comparing 18446744073709551615 with '1': 1

let values =
    [| BigInteger.Pow(Int64.MaxValue, 10)
       Unchecked.defaultof<bigint>
       bigint 12.534
       Int64.MaxValue
       BigInteger.One |]

let number = bigint UInt64.MaxValue

for value in values do
    try
        printfn $"Comparing {number} with '{value}': {number.CompareTo value}"
    with :? ArgumentException as e ->
        printfn $"Unable to compare the {value.GetType().Name} value {value} with a BigInteger."
// The example displays the following output:
//    Comparing 18446744073709551615 with '4.4555084156466750133735972424E+189': -1
//    Comparing 18446744073709551615 with '': 1
//    Unable to compare the Double value 12.534 with a BigInteger.
//    Unable to compare the Int64 value 9223372036854775807 with a BigInteger.
//    Comparing 18446744073709551615 with '1': 1

Dim values() As Object = { BigInteger.Pow(Int64.MaxValue, 10), Nothing, 
                           12.534, Int64.MaxValue, BigInteger.One }
Dim number As BigInteger = UInt64.MaxValue

For Each value As Object In values
   Try
      Console.WriteLine("Comparing {0} with '{1}': {2}", number, value, 
                        number.CompareTo(value))
   Catch e As ArgumentException
      Console.WriteLine("Unable to compare the {0} value {1} with a BigInteger.",
                        value.GetType().Name, value)
   End Try                     
Next                                 
' The example displays the following output:
'    Comparing 18446744073709551615 with '4.4555084156466750133735972424E+189': -1
'    Comparing 18446744073709551615 with '': 1
'    Unable to compare the Double value 12.534 with a BigInteger.
'    Unable to compare the Int64 value 9223372036854775807 with a BigInteger.
'    Comparing 18446744073709551615 with '1': 1

注解

参数 obj 必须是下列参数之一：

  • 运行时类型为 BigInteger..

  • Object其值为 null. 的变量。 如果参数的值为obj，则该方法返回 1，指示当前实例大于 obj。null

适用于

另请参阅