using System;

​

public class Program

{

    public static void Main(string[] args)

​

        {

​

            string lastName;

            string firstName;

            double points = 0;

​

            Console.WriteLine("This is the Student Grade Calculator Program");

​

            Console.WriteLine("Enter your Students First Name ");

            firstName = Convert.ToString(Console.ReadLine());

​

            Console.WriteLine("Enter " + firstName + "'s Last Name");

            lastName = Convert.ToString(Console.ReadLine());

​

            Console.WriteLine("Enter " + firstName + " " + lastName + "'s" + " Total Achieved Points this Course Marking Period. Score must be between 0 and 1000");

            points = Convert.ToDouble(Console.ReadLine());

​

            if (points >= 900 && points <= 1000)

            {

                points = points / 10;

​

                Console.WriteLine("The grade for the student " + firstName + " " + lastName + " " + " is as follows:");

                Console.WriteLine("The percent for this score is " + points + "%");

                Console.WriteLine("This grade is an 'A' and is worth 4.0 GPA");

                Console.WriteLine("");

​

            }

​

            else if (points >= 800 && points < 900)

            {

                points = points / 10;

​

                Console.WriteLine("The grade for the student " + firstName + " " + lastName + " " + " is as follows:");

                Console.WriteLine("The percent for this score is " + points + "%");

                Console.WriteLine("This grade is a 'B' and is worth 3.0 GPA");

                Console.WriteLine("");

​

            }

​

            else if (points >= 700 && points < 800)

            {

                points = points / 10;

​

                Console.WriteLine("The grade for the student " + firstName + " " + lastName + " " + " is as follows:");

                Console.WriteLine("The percent for this score is " + points + "%");

                Console.WriteLine("This grade is a 'c' and is worth 2.0 GPA");

                Console.WriteLine("");

​

            }

​

            else if (points >= 600 && points < 700)

            {

                points = points / 10;

​

                Console.WriteLine("The grade for the student " + firstName + " " + lastName + " " + " is as follows:");

                Console.WriteLine("The percent for this score is " + points + "%");

                Console.WriteLine("This grade is a 'D' and is worth 1.0 GPA");

                Console.WriteLine("");

​

            }

​

            else if (points >= 0 && points < 600)

            {

                points = points / 10;

​

                Console.WriteLine("The grade for the student " + firstName + " " + lastName + " " + " is as follows:");

                Console.WriteLine("The percent for this score is " + points + "%");

                Console.WriteLine("This grade is an 'F' and is worth 0.0 GPA");

                Console.WriteLine("");

​

            }

             else if (points < 0 || points > 1000)

            {

             Console.WriteLine("Score must be between 0 and 1000");

             }

​

        }

    }

​

​