using System;

public class Program

{

    public static void Main()

    {

        /*

        1. Can you use the Switch statement for a Double type? Why (why not)?

        No - because it loses precision with the the double tpye, and multiple values cannot be represented by the same sequence.

​

        2. Can you have duplicate cases in a Switch?

        No.

​

        3. Can you use a variable in the case? i.e., Instead of “case 0:” have “case x:”

        No - because the case value should be constant.

        4. Write the following program in dotnetfiddle.net, save it as Lab7 there. Share that link here.

​

            1.Get a string from the user (this string represents a student’s major.)

​

            2.Get a number from a user (this number represents a student’s score.)

​

            3.Validate whether the score is a whole number.

                If not, show an error message.

            4.Validate whether the score’s range is between 0 and 100.

​

                If not, show an error message.

​

        5.Show the following information based on the score.

​

            Score: >= 90, show "You get A ".

​

            Score: 80 ~ 89, show "You get B ".

​

            Score: 70 ~ 79, show "You get C".

​

            Score: 60 ~ 69, show "You get D".

​

            Score: < 60, show  "You get F".

​

            For an individual's score greater than 90, check his/her major

​

            Show "Congratulations! You are one of the best students in IS." if the major is "Information Systems"

​

            Show "Congratulations! You are one of the best students.” for other majors.

        */

        //prompt

        Console.WriteLine("What is your major?");

        //get input

        string strMajor = Console.ReadLine();

        //prompt for score

        Console.WriteLine("What is your score?");

        string strScore = Console.ReadLine();

        int iScore;

        bool ValidScore = int.TryParse(strScore, out iScore);

        if (!ValidScore)

        {   

            Console.WriteLine("Score must be a number!");

            return;

        }

        if (!(iScore >= 0 && iScore <= 100))

        {

            Console.WriteLine("Score must be between 0 and 100.");

            return;

        }

        string Letter;

        if (iScore >= 90) Letter = "A";

        else if (iScore >= 80) Letter = "B";

        else if (iScore >= 70) Letter = "C";

        else if (iScore >= 60) Letter = "D";

        else Letter = "F";

        Console.WriteLine("You get an {0}", Letter);

        if (iScore > 90) Console.WriteLine("Congratulations! You are one of the best students{0}.",

                                          strMajor == "IS" ? " in Information Systems" : "");

    }

}