//      c05au Example Program Text
//      C# version, NAG Copyright 2008
using System;
using NagLibrary;
using System.Globalization;
namespace NagDotNetExamples
{
  public class C05AUE
  {
    static void Main(String[] args)
    {
      StartExample();
    }
    public static void StartExample()
    {
      try
      {
	    //   C05.C05AG_F fC05AG = new C05.C05AG_F(f);
        C05.C05AU_F fC05AU = new C05.C05AU_F(f);
        double a,  b,  eps,  eta,  h,  x; int ifail;
        Console.WriteLine("c05au Example Program Results");
        x = 1.00e0;
        h = 0.10e0;
        eps = 1.00e-5;
        eta = 0.00e0;
        //
	  //    C05.c05ag(ref x, h, eps, eta, fC05AG, out a, out b, out ifail);
        C05.c05au(ref x, h, eps, eta, fC05AU, out a, out b, out ifail);
        //
        Console.WriteLine("");
        if (ifail == 0)
        {
          Console.WriteLine("  {0}{1,13:f5}", "Root is ", x);
          Console.WriteLine("  {0}{1,8:f5}{2}{3,8:f5}{4}", "Interval searched is [", a, ",", b, "]");
        }
        else
        {
          Console.WriteLine("** c05au failed with ifail = {0,5}", ifail);
          if ((ifail == 3) || (ifail == 4))
          {
            Console.WriteLine("  {0}{1,13:f5}", "Final value = ", x);
          }
        }
        //
      }
      catch (Exception e)
      {
        Console.WriteLine(e.Message);
        Console.WriteLine("Exception Raised");
      }
      Console.WriteLine("");
    }
    //
    public static double f(double x)
    {
      double fValue;
      fValue = x - Math.Exp(-x);
      return fValue;
    }
  }
}