using System;

public class Program

{

    public static void Main()

    {

        //Q1 (4 pts)

        //Assume you have the following item code: string strItemCode = "sony-dvd-062019"

        string strItemCode = "sony-dvd-062019";

        Console.WriteLine("Original Item Code: {0}", strItemCode);

        //display the Manufacturer Code, the Product Code, the Month, and Year when the item was manufactured. (1 point each)

        string[] strArray = strItemCode.Split('-');

        Console.WriteLine("Manufacturer: {0}",strArray[0]);

        Console.WriteLine("Product: {0}",strArray[1]);

        int dash1 = strItemCode.IndexOf("-");

        int dash2 = strItemCode.IndexOf("-",dash1+1); 

        string month = strItemCode.Substring(dash2+1,2);

        Console.WriteLine("Month Produced: {0}",month);

        int length = month.Length; 

        string year = strItemCode.Substring(dash2+length+1,4); 

        Console.WriteLine("Year Produced: {0}",year);

            //Output example=> Manufacturer: sony, Product:dvd, month: 06, year: 2019 (Hint: Use Split(), and Substring() function)

        //Q2 (2 pts)

        //Accepts an email address (a string) from the user.

        Console.WriteLine("Please input your email address");

        string email = Console.ReadLine();

        //Check whether this is a valid email or not. A valid email always contains an “@”. If a user types an invalid email, you should show a warning message and stop the program.

        while (email.IndexOf("@") < 0 || string.IsNullOrEmpty(email) || email.IndexOf(".") < 0 ) 

        {

            Console.WriteLine("This is not a valid email address");

            Console.WriteLine("Please enter a valid address, this contains an @ and .");

            email = Console.ReadLine();

        }

        //Print out the user name and domain. (Hint: Use IndexOf() function)

        int userL = email.IndexOf("@");

        Console.WriteLine(userL); 

        string[] stremail = email.Split('@');

        Console.WriteLine("Username is: {0}",stremail[0]);

        Console.WriteLine("Domain is: {0}",stremail[1]);

    }

}