public static T ReadStudentsFromFile <T>(string filePath) where T : IEnumerable <Student>
{
List <Student> students = new List <Student>();
string line;
try
{
StreamReader file = new StreamReader(filePath);
while ((line = file.ReadLine()) != null)
{
string[] values = line.Split(';');
Student student = new Student();
foreach (string pair in values)
{
string[] pairVal = pair.Split(':');
if (pairVal.Length != 2)
{
continue;
}
string identifier = pairVal[0].Trim().ToLower();
string value = pairVal[1].Trim();
if (identifier.Equals("name"))
{
student.Name = value;
}
if (identifier.Equals("sirname"))
{
student.LastName = value;
}
if (identifier.Equals("homework"))
{
string[] grades = value.Split(',');
int numeric;
foreach (string grade in grades)
{
if (int.TryParse(grade, out numeric))
{
if (numeric >= 0 && numeric <= 10)
{
student.AddHomeworkGrade(numeric);
}
else
{
Console.WriteLine("Namu darbo pazimys negali buti neigiama reiksme arba virsyti 10");
}
}
else
{
Console.WriteLine("Neisejo nuskaityti namu darbo pazymio [" + grade + "]");
}
}
}
if (identifier.Equals("exam"))
{
int numeric;
if (int.TryParse(value, out numeric))
{
if (numeric >= 0 && numeric <= 10)
{
student.ExamGrade = numeric;
}
else
{
Console.WriteLine("Egzamino pazimys negali buti neigiama reiksme arba virsyti 10");
}
}
else
{
Console.WriteLine("Neisejo nuskaityti egzamino pazymio [" + value + "]");
}
}
}
students.Add(student);
}
file.Close();
}
catch (Exception e)
{
Console.WriteLine("Ivyko klaida skaitant faila:");
Console.WriteLine(e.Message);
}
return((T)Activator.CreateInstance(typeof(T), students));
}
private void generateStudentLists()
{
Console.Clear();
Stopwatch w = new Stopwatch();
w.Start();
Random r = new Random();
for (int i = 0; i < 7; i++)
{
List <Student> list = new List <Student>();
for (int j = 0; j < Math.Pow(10, i + 1); j++)
{
Student student = new Student();
student.Name = "Student_" + j;
student.LastName = "Sirname_" + j;
student.ExamGrade = r.Next(0, 11);
for (int k = 0; k < 10; k++)
{
student.AddHomeworkGrade(r.Next(0, 11));
}
student.getGradeAvg(false);
list.Add(student);
}
Writer.WriteStudentsToFile("_" + Math.Pow(10, i + 1) + ".txt", list);
list.Sort((o1, o2) => o1.AverageGrade.CompareTo(o2.AverageGrade));
int marker = list.Count / 2;
int direction = 0;
if (list.ElementAt(marker).AverageGrade >= 5.0f)
{
direction = -1;
}
else
{
direction = 1;
}
while (true)
{
marker += direction;
if (direction > 0)
{
if (list.ElementAt(marker).AverageGrade >= 5.0f)
{
break;
}
}
if (direction < 0)
{
if (list.ElementAt(marker).AverageGrade < 5.0f)
{
marker++;
break;
}
}
}
Writer.WriteStudentsToFile("_" + Math.Pow(10, i + 1) + "_vargsiukai.txt", list.GetRange(0, marker));
Writer.WriteStudentsToFile("_" + Math.Pow(10, i + 1) + "_galvociai.txt", list.GetRange(marker, list.Count - marker));
}
w.Stop();
Console.WriteLine("Ivykdyta per: " + w.ElapsedMilliseconds + "ms");
Run();
}
