static void Main(string[] args)
{
GradeBook book = new GradeBook();
book.AddGrade(91f);
book.AddGrade(89.1f);
book.AddGrade(75f);
GradeStatistics stats = book.ComputeStatistics();
Console.WriteLine(stats.AverageGrade);
Console.WriteLine(stats.HighestGrade);
Console.WriteLine(stats.LowestGrade);
Console.WriteLine(stats.LetterGrade);
Console.ReadLine();
}
public GradeStatistics ComputeStatistics()
{
GradeStatistics stats = new GradeStatistics();
stats.HighestGrade = 0;
float sum = 0f;
foreach (float grade in grades)
{
stats.HighestGrade = Math.Max(grade, stats.HighestGrade);
stats.LowestGrade = Math.Min(grade, stats.LowestGrade);
sum += grade;
}
if (grades.Count != 0)
{
stats.AverageGrade = sum / grades.Count;
}
return(stats);
}