using System;

​

public class Program

{

    public static void Main()

    {

    // Programmer: TianYou

    // Date(s): Start:Dec 1 End:Dec 5

    // Project: Guidance Counselor

    // Description:The program helps users find their guidance counselors by asking them questions, based on whether they are international students or last names.

    Start:

    Console.WriteLine("Welcome to St. David's Guidance Department!");

    Console.WriteLine("Do you need assistance in finding your guidance Counsellor? (Y/N)");

    string need = Console.ReadLine().Trim().ToUpper();

    if ( need == "Y")

     {Console.WriteLine("Good!Let's go to find your guidance counselor.");}

     else if(need == "N")

     {Console.WriteLine("If you have any questions, feel free to ask!");

      goto Start;// Return to the beginning of the program

     }

     else{

         Console.WriteLine("Sorry, please enter valid characters!");

         goto Start; // Return to the beginning of the program

     }

     Console.WriteLine("Are you an international student? (Y/N)");

     string international = Console.ReadLine().Trim().ToUpper();

     string counselor;

     if (international == "Y")

     { // Assign Ms.Kueneman if the user is an international student

         counselor = "Ms.Kueneman";

     }

     else

     { Start2:

       // If not an international student, ask for their last name

      Console.WriteLine("Please enter your last name: ");

      string lastName = Console.ReadLine().Trim();

      if (string.IsNullOrEmpty(lastName))

      {   //Prevent the user from entering empty input.

          Console.WriteLine("Sorry, please enter a valid last name!");

          goto Start2;}

      // Counselors are assigned by initial letter of last name

      string firstLetter = lastName.Substring(0, 1).ToUpper();

      // Check whether the initial letter is in the range A to E 

      if (string.Compare(firstLetter, "A") >= 0 && string.Compare(firstLetter,"E") <= 0)

      {

          counselor = "Ms.Dietrich";}

      // Check whether the initial letter is in the range F to O

      else if (string.Compare(firstLetter,"F") >= 0 && string.Compare(firstLetter,"O") <= 0)

      {counselor = "Ms.Nagy";}

      // Check whether the initial letter is in the range P to S

      else if (string.Compare(firstLetter,"P") >= 0 && string.Compare(firstLetter,"S") <= 0)

      {counselor = "Ms.Kueneman";}

      // Check whether the initial letter is in the range T to Z

      else if (string.Compare(firstLetter,"T") >= 0 && string.Compare(firstLetter,"Z") <= 0)

      {counselor = "Ms.Lehmann";}

      else

      {Console.WriteLine("Sorry, please enter a valid last name!");

       goto Start2;}

        }

     Console.WriteLine("Your guidance counselor is: " + counselor);

    }

}

​