BigInteger.IComparable.CompareTo(Object) 方法

定义

命名空间:

System.Numerics

程序集:

System.Runtime.Numerics.dll

将此实例与指定对象进行比较，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

一个带符号整数，指示当前实例与 obj 参数的关系，如下表所示。

返回值	说明
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 obj，或者 obj 参数为 null。

实现

CompareTo(Object)

例外

ArgumentException

obj 不是 BigInteger。

示例

以下示例调用 方法， CompareTo(Object) 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

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 必须是下列值之一：

• 运行时类型为 BigInteger的对象。

• 值为 Object 的 null变量。 如果 参数null的obj值为 ，则该方法返回 1，指示当前实例大于 obj。

另请参阅

• CompareTo(Object)