using System;

public class Program

{

    public static void Main()

    {

        // set variables

            string firstName;

            string lastName;

            string grade = "";

            int percentage = 0;

            double score = 0.00;

​

            //Accept Inputs

            Console.Write("Enter First Name:");

            firstName = Console.ReadLine();

            Console.Write("Enter Last Name:");

            lastName = Console.ReadLine();

            Console.Write("Enter Number of points:");

            score = double.Parse(Console.ReadLine());

            if (score >= 0 && score <= 1000)

            {

                Console.WriteLine("---- Good Score -----");

​

                //calculate percentage

                percentage = (int) ((score / 1000) * 100);

                // Determine Grade

                if (percentage >= 90 && percentage <= 100)

                {

                    grade = "A";

                }

                else if (percentage >= 80 && percentage <= 89)

                {

                    grade = "B";

                }

                else if (percentage >= 70 && percentage <= 79)

                {

                    grade = "C";

                }

                else if (percentage >= 60 && percentage <= 69)

                {

                    grade = "D";

                }

                else if (percentage <= 59)

                {

                    grade = "F";

                }

​

                Console.WriteLine("----------------------------");

                Console.WriteLine("First Name: " + firstName);

                Console.WriteLine("Last Name: " + firstName);

                Console.WriteLine("No. of Points: " + score);

                Console.WriteLine("Percentage: " + percentage);

                Console.WriteLine("Grade: " + grade);

                Console.WriteLine("----------------------------");

            }

            else

            {

                Console.WriteLine("Error Input is less than 0 or  greater than 1000.");

            }

    }

}