internal double CalculateStudentGrade(string studentName)
{
int[] scores = ScoresByStudent.First(s => s.Key == studentName).Value;
double grade = (scores.Average() / 100) * 4 + 2;
return(grade);
}
internal void EnrollStudent(string studentName)
{
if (ScoresByStudent.Any(s => s.Key == studentName))
{
throw new StudentAlreadyEnrolledInCourseException(studentName, Name);
}
else
{
ScoresByStudent.Add(studentName, new int[NumberOfTasksPerExam]);
}
}
internal void SetScoresForStudent(string studentName, int[] newScores)
{
if (!ScoresByStudent.ContainsKey(studentName))
{
throw new StudentNotEnrolledInCourseException(studentName, Name);
}
else if (newScores.Length > NumberOfTasksPerExam)
{
throw new InvalidNumberOfScoresException(studentName, Name);
}
else
{
int[] oldScores = ScoresByStudent.First(s => s.Key == studentName).Value;
for (int s = 0; s < newScores.Length; s++)
{
if (newScores[s] > oldScores[s])
{
oldScores[s] = newScores[s];
}
}
}
}