static void Main(string[] args)
{
GradeBook book = new GradeBook();
book.AddGrade(91);
book.AddGrade(89.5f);
book.AddGrade(75);
GradeStatistics stats = book.ComputeStatistics();
Console.WriteLine(stats.AverageGrade);
Console.WriteLine(stats.HighestGrade);
Console.WriteLine(stats.LowestGrade);
Console.ReadLine();
}
public GradeStatistics ComputeStatistics()
{
GradeStatistics stats = new GradeStatistics();
float sum = 0;
foreach (float grade in grades)
{
sum += grade;
stats.HighestGrade = Math.Max(grade, stats.HighestGrade);
stats.LowestGrade = Math.Min(grade, stats.LowestGrade);
}
stats.AverageGrade = sum / grades.Count;
return(stats);
}