Simple C# application for coffee shop.

The following code in c# is using only switch..case and do while loop. I think the following code is self explanatory. So I don’t want to give explanation of the code.

using System;

namespace ConsoleApplication25

{

    class Program

    {

        static void Main(string[] args)

        {

            int totalcoffeecost=0;

            string userdecision=string.Empty;

            do

            {

                int userchoice = -1;

                do

                {

                    Console.WriteLine("please select your coffee size 1.small 2.medium 3.large");

                    userchoice = int.Parse(Console.ReadLine());

                    switch (userchoice)

                    {

                        case 1: totalcoffeecost += 1; break;

                        case 2: totalcoffeecost += 2; break;

                        case 3: totalcoffeecost += 3; break;

                        default: Console.WriteLine("your choice {0} is invalid", userchoice); break;

                    }

                }

                while (userchoice != 1 && userchoice != 2 && userchoice != 3);

                do

                {

                    Console.WriteLine("DO YOU WANT TO BUY ANOTHER COFFEE-yes or no");

                    userdecision = Console.ReadLine().ToUpper();

                    if (userdecision != "YES" && userdecision != "NO")

                    {

                        Console.WriteLine("your choice {0} is invalid.please try again...", userdecision);

                    }

                }

                while (userdecision != "YES" && userdecision != "NO");

            }

            while (userdecision.ToUpper() != "NO");

        Console.WriteLine("thankyou for shopping with us");

        Console.WriteLine("billamount={0}",totalcoffeecost);

        Console.ReadLine();

        }

    }

}

Output:

-------Thank you

                                                                     Muthu karthikeyan,Madurai