1:  /// -------- ToujoursEnBeta

   2:  /// Author & Copyright : Peter Luschny

   3:  /// License: LGPL version 3.0 or (at your option)

   4:  /// Creative Commons Attribution-ShareAlike 3.0

   5:  /// Comments mail to: peter(at)luschny.de

   6:  /// Created: 2010-03-01

   7:   

   8:  namespace Sharith.Math.Factorial 

   9:  {

  10:      using XInt = Sharith.Arithmetic.XInt;

  11:   

  12:      public class ProductNaive : IFactorialFunction  

  13:      {

  14:          public ProductNaive() { }

  15:   

  16:          public string Name

  17:          {

  18:              get { return "ProductNaive        "; }

  19:          }

  20:   

  21:          public XInt Factorial(int n)

  22:          {

  23:              if (n < 0)

  24:              {

  25:                  throw new System.ArgumentOutOfRangeException("n",

  26:                  Name + ": n >= 0 required, but was " + n);

  27:              }

  28:   

  29:              XInt nFact = XInt.One;

  30:   

  31:              for (int i = 2; i <= n; i++)

  32:              {

  33:                  nFact *= i;

  34:              }

  35:              return nFact;

  36:          }

  37:      }

  38:  }   // endOfProductNaive