private static void DisplayResults(IGradeTracker book)
{
GradeBookStatistics stats = book.ComputeStatistics();
foreach (float grade in book)
{
Console.WriteLine(grade);
}
WriteResult("Average", stats.AverageGrade);
WriteResult("Highest", (int)stats.HighestGrade);
WriteResult("Lowest", stats.LowestGrade);
WriteResult(stats.GradeDescription, stats.LetterGrade);
}
public override GradeBookStatistics ComputeStatistics()
{
GradeBookStatistics stats = new GradeBookStatistics();
float sum = 0;
foreach (float grade in grades)
{
stats.HighestGrade = Math.Max(grade, stats.HighestGrade);
stats.LowestGrade = Math.Min(grade, stats.LowestGrade);
sum += grade;
}
stats.AverageGrade = sum / grades.Count;
return(stats);
}
public GradeBookStatistics ComputeStatistics()
{
GradeBookStatistics stats = new GradeBookStatistics();
float sum = 0;
stats.Highest = grades[0];
stats.Lowest = grades[0];
foreach (float g in grades)
{
sum += g;
stats.Highest = Math.Max(g, stats.Highest);
stats.Lowest = Math.Min(g, stats.Lowest);
}
stats.Average = sum / grades.Count;
return(stats);
}
private static void RunBookApp()
{
GradeBook book = new GradeBook();
// Events
book.NameChanged += new NameChangedDelegate(OnNameChanged);
book.NameChanged += new NameChangedDelegate(OnNameChanged2);
book.NameChanged += OnNameChanged2;
book.NameChanged += OnNameChanged2;
book.NameChanged -= OnNameChanged2;
/// Delegate
Writer w = new Writer(WriteBookName);
book.Name = "My book";
// Exception
try
{
book.Name = "";
}
catch (ArgumentNullException e)
{
Console.WriteLine(e.Message);
}
book.AddGrade(91);
book.AddGrade(84.5f);
GradeBookStatistics stat = book.ComputeStatistics();
w(book);
//WriteBookName(book);
WriteResult("Lowest Grade", stat.Lowest);
WriteResult("Highest Grade", stat.Highest);
WriteResult("Average Grade", stat.Average);
WriteResult("LetterGrade", stat.LetterGrade);
book.WriteGrades(Console.Out);
// Exception
using (StreamWriter sw = File.CreateText("grades.txt"))
{
book.WriteGrades(sw);
sw.Close();
}
}
