using System;

public class Program

{

    public static void Main()

    {

        /*

        Q1

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

        The item code for a particular wholesaler is a combination of things including the Manufacturer Code, the Product Number, and the Month & Year produced. The parts of the item code are separated by “-“.

        So given any item code in the format above, your program will display the Manufacturer Code, the Product Code, the Month, and Year when the item was manufactured. (1 point each)

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

        */

        string strItemCode = "sony-dvd-062019";

        string[] myEntry;

        myEntry = strItemCode.Split('-');

        string strDate = myEntry[2];

        string strMonth = strDate.Substring(0,2);

        string strYear = strDate.Substring(2,4);

        Console.WriteLine("Manufacturer: " + myEntry[0]);

        Console.WriteLine("Product: " + myEntry[1]);

        Console.WriteLine("Month: " + strMonth);

        Console.WriteLine("Year: " + strYear);

        Console.WriteLine("");

        /*

        Q2

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

        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.

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

        */

        Console.WriteLine("Enter your email address: ");

        string stremail = Console.ReadLine();

        int intStringSize = stremail.Length;

        int intAtSign = stremail.IndexOf("@");

        if (intAtSign <= 0 || stremail.EndsWith("@"))

        {

            Console.WriteLine("Please enter a valid email address.");

        }

        else

        {

            string strUsername = stremail.Substring(0, intAtSign);

            int intstartIndex = intAtSign + 1;

            int intlength = intStringSize - intstartIndex;

            string strDomain = stremail.Substring(intstartIndex, intlength);

            Console.WriteLine("Username: " + strUsername);

            Console.WriteLine("Domain: " + strDomain);

        }

    }

}