internal double CalculateGrade(string courseName)
{
int[] scores = ScoresByCourse.First(c => c.Key == courseName).Value;
double grade = (scores.Average() / 100) * 4 + 2;
return(grade);
}
internal void EnrollInCourse(string courseName)
{
if (ScoresByCourse.ContainsKey(courseName))
{
throw new StudentAlreadyEnrolledInCourseException(Name, courseName);
}
else
{
ScoresByCourse.Add(courseName, new int[Course.NumberOfTasksPerExam]);
}
}
internal void SetScoresForCourse(string courseName, int[] newScores)
{
if (!ScoresByCourse.ContainsKey(courseName))
{
throw new StudentNotEnrolledInCourseException(Name, courseName);
}
else if (newScores.Length > Course.NumberOfTasksPerExam)
{
throw new InvalidNumberOfScoresException(Name, courseName);
}
else
{
int[] oldScores = ScoresByCourse.First(c => c.Key == courseName).Value;
for (int s = 0; s < newScores.Length; s++)
{
if (newScores[s] > oldScores[s])
{
oldScores[s] = newScores[s];
}
}
}
}