BigInteger.GreatestCommonDivisor(BigInteger, BigInteger) 方法

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

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

static member GreatestCommonDivisor : System.Numerics.BigInteger * System.Numerics.BigInteger -> System.Numerics.BigInteger

Public Shared Function GreatestCommonDivisor (left As BigInteger, right As BigInteger) As BigInteger

參數

傳回

與left的最大right公因數。

範例

以下範例說明了對GreatestCommonDivisor該方法的呼叫及例外處理，以提供有用的資訊。ArgumentOutOfRangeException 結果顯示這兩個數字的最大公因數為1。

BigInteger n1 = BigInteger.Pow(154382190, 3);
BigInteger n2 = BigInteger.Multiply(1643590, 166935);
try
{
   Console.WriteLine("The greatest common divisor of {0} and {1} is {2}.",
                     n1, n2, BigInteger.GreatestCommonDivisor(n1, n2));
}
catch (ArgumentOutOfRangeException e)
{
   Console.WriteLine("Unable to calculate the greatest common divisor:");
   Console.WriteLine("   {0} is an invalid value for {1}",
                     e.ActualValue, e.ParamName);
}

let n1 = BigInteger.Pow(154382190, 3)
let n2 = BigInteger.Multiply(1643590, 166935)

try
    printfn $"The greatest common divisor of {n1} and {n2} is {BigInteger.GreatestCommonDivisor(n1, n2)}."
with :? ArgumentOutOfRangeException as e ->
    printfn $"Unable to calculate the greatest common divisor:"
    printfn $"   {e.ActualValue} is an invalid value for {e.ParamName}"

Dim n1 As BigInteger = BigInteger.Pow(154382190, 3)
Dim n2 As BigInteger = BigInteger.Multiply(1643590, 166935)
Try
   Console.WriteLine("The greatest common divisor of {0} and {1} is {2}.", _
                     n1, n2, BigInteger.GreatestCommonDivisor(n1, n2))
Catch e As ArgumentOutOfRangeException
   Console.WriteLine("Unable to calculate the greatest common divisor:")
   Console.WriteLine("   {0} is an invalid value for {1}", _
                     e.ActualValue, e.ParamName)
End Try

備註

最大公因數是指兩個值可以整除而不回傳餘數的最大數 BigInteger 值。

若 left 和 right 參數非零，方法總是回傳至少為 1，因為所有數皆可除以 1。 若任一參數為零，方法會回傳非零參數的絕對值。 若兩個值皆為零，則該方法回傳零。

方法回傳GreatestCommonDivisor的值無論參數left的符號right如何，都永遠是正值（包括零）。