using System;

using System.Text.RegularExpressions;

​

namespace Cohen_Brett_HW1

{

    public class Program

    {

        //Named constants

        public const decimal TacoPrice = 2.00m;

        public const decimal SandwichPrice = 7.00m;

        public const decimal TaxRate = .0825m;

​

​

        public static void Main(string[] args)

        {

            //Input variables

            String strCustCodeInput = "";

            int intTacoCountInput = 0;

            String strTacoCountInput = "";

            int intSandwichCountInput = 0;

            String strSandwichCountInput = "";

​

            //Variable for customer code validity

            Boolean boolCodeValid = false;

​

​

            //Get the customer code

            do

            {

                //Request input

                Console.WriteLine("Please enter the customer code:");

                strCustCodeInput = Console.ReadLine();

​

                //Make sure the code is valid

                boolCodeValid = CheckCode(strCustCodeInput);

​

            } while (boolCodeValid == false); //loop if customer code is invalid

​

​

            do

            {

                //Get the taco order count

                do

                {

                    //Request user input

                    Console.WriteLine("Enter the number of tacos you would like to order:");

​

                    //Read the input

                    strTacoCountInput = Console.ReadLine();

​

                    //Pass the string to CheckItem method and assign the result to intTacoCountInput

                    intTacoCountInput = CheckItem(strTacoCountInput);

                } while (intTacoCountInput == -1); //Loop if they enter an invalid number

​

​

                //Get the sandwich order count

                do

                {   //Request user input

                    Console.WriteLine("Enter the number of sandwiches you would like to order:");

​

                    //Read the input

                    strSandwichCountInput = Console.ReadLine();

​

                    //Pass the string to CheckItem method and assign the result to intTacoCountInput

                    intSandwichCountInput = CheckItem(strSandwichCountInput);

​

                } while (intSandwichCountInput == -1); //Loop if they enter an invalid number

​

                if (intTacoCountInput + intSandwichCountInput == 0)

                {

                    Console.WriteLine("Total number of items ordered must be greater than 0." + "\n");

​

                }

            } while (intTacoCountInput + intSandwichCountInput < 1); //make sure that total items ordered is at least one

​

​

            //Output variables

​

            //Total item count

            int intTotalItemCount = intTacoCountInput + intSandwichCountInput;

​

            //Taco subtotal

            decimal TacoSubtotal = TacoPrice * intTacoCountInput;

​

            //Sandwich subtotal

            decimal SandwichSubtotal = SandwichPrice * intSandwichCountInput;

​

            //Combined Subtotal

            decimal CombinedSubtotal = TacoSubtotal + SandwichSubtotal;

​

            //Tax Amount

            decimal TaxAmount = CombinedSubtotal * TaxRate;

​

            //Grand Total

            decimal GrandTotal = CombinedSubtotal + TaxAmount;

​

            //Console output

            Console.WriteLine("Customer Code: " + strCustCodeInput.ToUpper());

            Console.WriteLine("Total Items: " + intTotalItemCount);

            Console.WriteLine("Taco Subtotal: " + (TacoSubtotal.ToString("C")));

            Console.WriteLine("Sandwich Subtotal: " + (SandwichSubtotal.ToString("C")));

            Console.WriteLine("Full Subtotal: " + (CombinedSubtotal.ToString("C")));

            Console.WriteLine("Sales Tax: " + (TaxAmount.ToString("C")));

            Console.WriteLine("Grand Total: " + (GrandTotal.ToString("C")));

​

            //Keep console open

            Console.WriteLine("Press any key to exit");

            Console.ReadLine();

​

        }

​

​

        //This method validates the customer code

        public static Boolean CheckCode(String strInput)

        {

            if (strInput.Length < 4 || strInput.Length > 6)

            {

                Console.Write("Please enter a valid code, 4 to 6 characters, letters only." + "\n");

                return false;

            }

​

            else

            {   //make sure that input is letters only

                return Regex.IsMatch(strInput, @"^[a-zA-Z]+$");

            }

        }

​

​

        //This method validates the customer selection

        static int CheckItem(String strInput)

        {

            //Establish integer variable

            int NowInt;

​

            //Convert the strInput to an integer

            NowInt = Convert.ToInt32(strInput);

​

            //Validate

            if (NowInt > -1)

            {

                return NowInt;

            }

            else

            {

                Console.Write("Please enter a valid number greater than or equal to 0." + "\n");

                return -1;

            }

        }

    }

}