using System;

​

public class Program

{

    public static void Main()

    {

        GradeCalc G1 = new GradeCalc();

        G1.Calc();

    }

}

​

public class GradeCalc

{

    public string userid;

    public int numofgrades;

​

    public int gpa;

    public void Calc()

    {

        Console.WriteLine("Welcome to LPHS ACC");

        while (true)

        {

            Console.WriteLine("Enter studend ID:");

            userid = Console.ReadLine();

            if (userid == "0123456")

            {

                Console.WriteLine("You are entering grades for John Doe");

                break;

            }

            else if (userid == "9123911")

            {

                Console.WriteLine("You are entering grades for Jane Doe");

                break;

            }

            else

            {

                Console.WriteLine("Error! Specified ID is not found. Please try again!");

            }

        }

            //End of initial if's for determining student

            Console.WriteLine("How many grades are you entering?");

            numofgrades = int.Parse(Console.ReadLine());

            int[] grades = new int[numofgrades];

            for(int i = 0; i < numofgrades; i++) {

                Console.WriteLine("Enter assignment " + (i+1) + " score:");

                grades[i] = int.Parse(Console.ReadLine());

                if(grades[i] >0 && grades[i] <= 59) {

                    Console.WriteLine("Grade of F earned");

                    gpa+= 0;

                }

                else if(grades[i] >59 && grades[i] <= 69) {

                    Console.WriteLine("Grade of D earned");

                    gpa+= 1;

                }

                else if(grades[i] >69 && grades[i] <= 79) {

                    Console.WriteLine("Grade of C earned");

                    gpa+= 2;

                }

                else if(grades[i] >79 && grades[i] <= 89) {

                    Console.WriteLine("Grade of B earned");

                    gpa+= 3;

                }

                else if(grades[i] >89 && grades[i] <= 101) {

                    Console.WriteLine("Grade of A earned");

                    gpa+= 4;

                }

                else {

                    Console.WriteLine("Error! Incorrect percentage entered");

                }

            }

        gpa = gpa/numofgrades;

        if (userid == "0123456")

            {

                Console.WriteLine("For the " + numofgrades + "grades above, John Doe's GPA is " + gpa);

            }

            else if (userid == "9123911")

            {

                Console.WriteLine("For the " + numofgrades + "grades above, Jane Doe's GPA is " + gpa);

            }

            else

            {

                Console.WriteLine("There was an error somewhere!");

            }

        }

}