// Fig. 5.6: GradeBook.cs
// GradeBook class that solves class-average problem using 
// counter-controlled repetition.
using System;

public class GradeBook
{
    // auto-implemented property CourseName
    public string CourseName { get; set; }

    // constructor initializes CourseName property
    public GradeBook(string name)
    {
        CourseName = name; // set CourseName to name
    } // end constructor

    // display a welcome message to the GradeBook user
    public void DisplayMessage()
    {
        // property CourseName gets the name of the course
        Console.WriteLine("Welcome to the grade book for\n{0}!\n",
           CourseName);
    } // end method DisplayMessage

    // determine class average based on 10 grades entered by user
    public void DetermineClassAverage()
    {
        int total; // sum of the grades entered by user
        int gradeCounter; // number of the grade to be entered next
        int grade; // grade value entered by the user
        double average; // average of the grades

        // initialization phase
        total = 0; // initialize the total
        gradeCounter = 1; // initialize the loop counter

        // processing phase
        while (gradeCounter <= 10) // loop 10 times
        {
            Console.Write("Enter grade: "); // prompt the user
            grade = Convert.ToInt32(Console.ReadLine()); // read grade
            total = total + grade; // add the grade to total
            gradeCounter = gradeCounter + 1; // increment the counter by 1
        } // end while

        // termination phase
        average = total / 10.0; // integer division yields integer result

        // display total and average of grades
        Console.WriteLine("\nTotal of all 10 grades is {0}", total);
        Console.WriteLine("Class average is {0:F2}", average);
    } // end method DetermineClassAverage
} // end class GradeBook