/*
Mastering Visual C# .NET
by Jason Price, Mike Gunderloy

Publisher: Sybex;
ISBN: 0782129110
*/

/*
  Example3_1.cs illustrates the use of
  expressions to calculate and display
  the circumference of a circle
*/

public class Example3_1
{

  public static void Main()
  {

    const double Pi = 3.14159;
    double diameter = 2.5;

    // calculate the circumference
    double circumference = Pi * diameter;

    // display the circumference
    System.Console.WriteLine("Circumference = " + circumference);

  }

}

           
          

   

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
// EnvExit.cs -- Demonstrates the use of Environment.Exit() in
//               a command line program.
//
//               Compile this program with the following command line:
//                   C:>csc EnvExit.cs
namespace nsEnvExit
{
    using System;
    
    public class EnvExit
    {
        static public void Main ()
        {
            FirstFunction ();
            Console.WriteLine ("Application ends");
        }
        static public void FirstFunction()
        {
            SecondFunction ();
            Console.WriteLine ("First Function ends");
        }
        static public void SecondFunction()
        {
            ThirdFunction ();
            Console.WriteLine ("First Function ends");
        }
        static public void ThirdFunction()
        {
            try
            {
                Exception e = new Exception ();
                throw (e);
            }
            catch (Exception)
            {
                Console.WriteLine ("No other lines should print " +
                                   "to the console");
                Environment.Exit (-1);
            }
        }
    }
}



           
          

   


using System;
public class TryingCatching
{
    static int Zero = 0;
    public static void Main()
    {
        // watch for exceptions here
        try
        {
            int j = 22 / Zero;
        }
        // exceptions that occur in try are transferred here
        catch (Exception e)
        {
            Console.WriteLine("Exception " + e.Message);
        }
        Console.WriteLine("After catch");
    }
}

           
          

   

/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/

// 04 - Exception HandlingPassing Exceptions on to the CallerCaller Inform
// copyright 2000 Eric Gunnerson
using System;

public class CallerInform
{
    public static void Main()
    {
        Summer summer = new Summer();
        try
        {
            summer.DoAverage();
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception: {0}", e);
        }
    }
}
public class Summer
{
    int    sum = 0;
    int    count = 0;
    float    average;
    public void DoAverage()
    {
        try
        {
            average = sum / count;
        }
        catch (DivideByZeroException e)
        {
            // wrap exception in another one,
            // adding additional context.
            throw (new DivideByZeroException(
            "Count is zero in DoAverage()", e));
        }
    }
}

           
          

   

/*
A Programmer's Introduction to C# (Second Edition)
by Eric Gunnerson

Publisher: Apress  L.P.
ISBN: 1-893115-62-3
*/

// 04 - Exception HandlingPassing Exceptions on to the CallerCaller Confuse
// copyright 2000 Eric Gunnerson
using System;

public class CallerConfuse
{
    public static void Main()
    {
        Summer summer = new Summer();
        try
        {
            summer.DoAverage();
        }
        catch (Exception e)
        {
            Console.WriteLine("Exception {0}", e);
        }
    }
}
public class Summer
{
    int    sum = 0;
    int    count = 0;
    float    average;
    public void DoAverage()
    {
        try
        {
            average = sum / count;
        }
        catch (DivideByZeroException e)
        {
            // do some cleanup here
            throw;
        }
    }
}

           
          

   

/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa

Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/

namespace nsCompare
{
    using System;
    public class Compare
    {
        static public void Main (string [] args)
        {
            int TestArg;
            try
            {
                TestArg = int.Parse (args[0]);
            }
            catch (FormatException)
            {
                Console.WriteLine ("Please enter a number value.");
                return;
            }
            catch (IndexOutOfRangeException)
            {
                Console.WriteLine ("Please enter an argument");
                return;
            }
            string str;
            str = TestArg > 10 ? "The test is true" : "The test is false";
            Console.WriteLine (str);
        }
    }
}

           
          

/*
C#: The Complete Reference
by Herbert Schildt

Publisher: Osborne/McGraw-Hill (March 8, 2002)
ISBN: 0072134852
*/

// Use a nested try block.

using System;

public class NestTrys {
public static void Main() {
// Here, numer is longer than denom.
int[] numer = { 4, 8, 16, 32, 64, 128, 256, 512 };
int[] denom = { 2, 0, 4, 4, 0, 8 };

try { // outer try
for(int i=0; i < numer.Length; i++) { try { // nested try Console.WriteLine(numer[i] + " / " + denom[i] + " is " + numer[i]/denom[i]); } catch (DivideByZeroException) { // catch the exception Console.WriteLine("Can't divide by Zero!"); } } } catch (IndexOutOfRangeException) { // catch the exception Console.WriteLine("No matching element found."); Console.WriteLine("Fatal error -- program terminated."); } } } [/csharp]