using System ;

​

public class CalculatorProgam

{

      public static void Main ()      

    {

        #region doubles 

            double FirstNumber ;            double SecondNumber ;

          /*The two ints above are the numbers that the person using this program will 

          choose to either to find the sum, difference, product or quotient.*/

            double Operation ;

        /*The string above is there so the person using this program can choose 

        what operation to use for the two numbers they have chosen before.*/  

        #endregion doubles

        #region CalculatorLooks

​

            Console.WriteLine ("________________________________") ; 

            Console.WriteLine ("|         Calculator           |") ;

            Console.WriteLine ("|------------------------------|") ; 

            Console.WriteLine ("| Press 1 to do Addition       |") ;

            Console.WriteLine ("| Press 2 to do Subtraction    |") ;

            Console.WriteLine ("| Press 3 to do Multiplication |") ;

            Console.WriteLine ("| Press 4 to do Division       |") ;

            Console.WriteLine ("| Press 5 to Quit              |") ;

            Console.WriteLine ("--------------------------------") ; 

            /* The code in the CalculatorLooks region is there because it shows the person 

            using the program how to pick the operation they want and how to quit the program.*/

        #endregion CalculatorLooks

        #region ChooseNumbersAndOperation

        Console.WriteLine ("Please Enter A Number") ; /*Tells the user to enter a number*/ 

        FirstNumber = Double.Parse (Console.ReadLine()) ; /*This part of the code will show you where to enter the number you would like*/

        Console.WriteLine ("Please Enter Another Number") ; /*Tells the user to enter another number*/

        SecondNumber = Double.Parse (Console.ReadLine()) ; /*This part of the code will show you where to enter the other number you would like*/

        Console.WriteLine ("Choose What Operation You Would Like To Use (From Above 1-4)\n If You Would Like To Quit The Program Enter The Number 5") ; /*Tells the user to pick an operation they would like to use for the two numbers they chose*/

        Operation = Double.Parse (Console.ReadLine()) ; /*This part of the code will show you where you can choose the operation the user wants to use by using the numbers 1-4*/

        #endregion ChooseNumbersAndOperation

        #region MainCalculatorCode

               if (Operation == 1) /*If the user enters 1 for Addition the following will happen*/

            {

                Console.WriteLine ("{0}" + " " + "+" + " " + "{1}" + " " + "=" + " " + (FirstNumber + SecondNumber), FirstNumber, SecondNumber) ;

                /*It will Add the First Number and the Second Number to get the Sum*/

            }

          else if (Operation == 2) /*If the user enters 2 for Subtraction the following will happen*/

            {

                Console.WriteLine ("{0}" + " " + "-" + " " + "{1}" + " " + "=" + " " + (FirstNumber - SecondNumber), FirstNumber, SecondNumber) ;

                /*It will Subtract the First Number and the Second Number to get the Difference*/

            }

          else if (Operation == 3) /*If the user enters 3 for Multiplication the following will happen*/

            {

                Console.WriteLine ("{0}" + " " + "*" + " " + "{1}" + " " + "=" + " " + (FirstNumber * SecondNumber), FirstNumber, SecondNumber) ;

                /*It will Multiply the First Number and the Second Number to get the Product*/

            }

          else if (Operation == 4) /*If the user enters 4 for Division the following will happen*/  

            {

                Console.WriteLine ("{0}" + " " + "/" + " " + "{1}" + " " + "=" + " " + (FirstNumber / SecondNumber), FirstNumber, SecondNumber) ;

                /*It will Divide the First Number and the Second Number to get the Quotient*/

            }

          else if (Operation == 5) /*If the user enters 5 to Quit the following will happen*/   

            {

                Console.WriteLine ("Quitting Program, Good Bye") ;

                /*It Will Just Say "Quitting Program, Good Bye"*/

            }

        }

    }

​

        #endregion MainCalculatorCode