Multiple user defined exceptions demo in c#

Multiple user defined exceptions demo in c#

Assignment:

Below is the multiple user defined exceptions master program which takes a number as an input from the user and performs following operations on it as:

1) If number is > 100 throw number too large exception.

2) If number is < 0 throw negative number exception.

3) If number is even throw even number exception.

4) If number is zero throw number too zero exception.


otherwise calculates the sum of the digits of a given number. Ex. 1233 = 1 + 2 + 3 + 3 = 9


Solution:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace exception_master_demo
{
    class Greaterthanzero :Exception
    {
        public override string ToString()
        {
            return "Number greater than zero....";
        }
    }

    class Lessthanzero : Exception
    {
        public override string ToString()
        {
            return "Number less than zero....";
        }
    }

    class Zeronoexception : Exception
    {
        public override string ToString()
        {
            return "Number is zero....";
        }
    }

    class Evennoexception : Exception
    {
        public override string ToString()
        {
            return "Number is even....";
        }
    }

   
    class Program
    {
        int n;
        void operation(int n)
        {

            int r = 0;
            if (n > 100)
                throw new Greaterthanzero();
            else if (n < 0)
                throw new Lessthanzero();
            else if (n % 2 == 0)
                throw new Evennoexception();
            else if (n == 0)
                throw new Zeronoexception();
           
            else
            {
             
                while (n > 0)
                {
                    int d = n % 10;
                    r = r + d;
                    n = n / 10;
                }
                Console.WriteLine("result is={0}",r);
            }
        }

        static void Main(string[] args)
        {
            Program p = new Program();
            try {
            p.operation(27);
            p.operation(0);
            }catch(Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
            Console.ReadLine();
        }
    }
}