private static void SaveGrades(Grades book)
{
using (StreamWriter outputFile = File.CreateText("grades.txt"))
{
book.WriteGrades(outputFile);
outputFile.Dispose();
}
}
static void Main(string[] args)
{
Grades book = new Grades();
FileStream stream = null;
StreamReader reader = null;
try
{
stream = File.Open("grades.txt", FileMode.Open);
reader = new StreamReader(stream);
string line = reader.ReadLine();
while (line != null)
{
float grade = float.Parse(line);
book.AddGrade(grade);
line = reader.ReadLine();
}
}
catch (FileNotFoundException ex)
{
Console.WriteLine("Could not locate the file grades.txt");
return;
}
catch (UnauthorizedAccessException ex)
{
Console.WriteLine("Context restricted");
return;
}
finally
{
if (reader != null)
{
reader.Close();
}
if (stream != null)
{
stream.Close();
}
}
book.AddGrade(91f);
book.AddGrade(89.5f);
book.AddGrade(75f);
book.WriteGrades(Console.Out);
GradeStatistics stats = book.ComputeStatistics();
Console.WriteLine("The average grade is " + stats.AverageGrade);
Console.WriteLine("The highest grade is " + stats.HighestGrade);
Console.WriteLine("The lowest grade is " + stats.LowestGrade);
Console.WriteLine("{0} {1}", stats.LetterGrade, stats.Description);
Console.ReadLine();
}