Program to design calculator using switch case.

Write a program to design calculator using switch case.

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

namespace Csharp

{

    /// <summary>

    /// Simple Switch Case Example

    /// </summary>

    class SimpleSwithch

    {

        public static void Main(string[] args)

        {

            Calculator obj = new Calculator();

            obj.cal();

            Console.ReadLine();

        }

    }

    class Calculator

    {

        public int a, b, sum,diff,mul,div;

        public char c;

        public void cal()

        {

        menu:

            Console.Clear();

            Console.WriteLine("=======================================");

            Console.WriteLine("Menu");

            Console.WriteLine("1.Addition");

            Console.WriteLine("2.Subtraction");

            Console.WriteLine("3.Multiplication");

            Console.WriteLine("4.Division");

            Console.WriteLine("=======================================");

         

            Console.WriteLine("Enter Your Option");

            c = Convert.ToChar(Console.ReadLine());

            Console.WriteLine("Enter the Values of a,b");

            a = Convert.ToInt32(Console.ReadLine());

            b = Convert.ToInt32(Console.ReadLine());

            switch (c)

            {

                case '1':

                    sum = a + b;

                    Console.WriteLine("{0}", sum);

                    break;

                case '2':

                    diff = a - b;

                    Console.WriteLine("{0}", diff);

                    break;

                case '3':

                    mul = a * b;

                    Console.WriteLine("{0}", mul);

                    break;

                case '4':

                    div = a / b;

                    Console.WriteLine("{0}", div);

                    break;

                   

            }

            Console.WriteLine("Enter M for Menu or Any other key to Exit");

            c = Convert.ToChar(Console.ReadLine());

            if (c == 'M')

            {

                goto menu;

            }

        }

    }

}