using System;

public class Program

{

    public static void Main()

    {

        //Lab 7

        //1. You cannot use the Switch statement for a Double type because you cannot represent every double number. It is infinite

        //2. You cannot have duplicate cases in a Switch.

        //3. No you cannot use a variable in a case

        //4.    

        /*  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.*/

        Console.WriteLine("What is your name?"); //asks user for name

        string name = Console.ReadLine(); //allows an input

        Console.WriteLine("What is your score"); //asks user for their score

        string score =Console.ReadLine(); //allows an input

        int intNumber;

         bool IsValidNumber = Int32.TryParse(score, out intNumber); //check if the score is a whole number

        if (IsValidNumber == false) //if it is not a whole number then it will return an error message

        {

            Console.WriteLine("Please enter a whole number");

            return;

        }

        else if(intNumber<0||intNumber>100) //if the score is not between 0-100 the program will return an error message

        {

            Console.WriteLine("Please enter a number between 0 and 100");

            return;

        }

        else if(intNumber >= 90)

        {

            Console.WriteLine("You get A");

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

            string major = Console.ReadLine();

            Console.WriteLine("Congratulaltions! You are one of the best students in " + major);

        }

        else if(intNumber >=80)

        {

            Console.WriteLine("You get B");

        }

        else if(intNumber >=70)

        {

            Console.WriteLine("You get C");

        }

        else if(intNumber >= 60)

        {

            Console.WriteLine("You get D");

        }

        else if(intNumber < 60)

        {

            Console.WriteLine("You get F");

        }

    }

}