Update methods.cs

src/methods.cs

@@ -1,15 +1,29 @@
-namespace struct_lab_student {
-	public partial class Program {
+namespace struct_lab_student
+{
+	public partial class Program
+	{
 		static void Var9(List<Student> students) 
 		{
-			var processedStudents = ProcessData(students);
-			WriteData(processedStudents, "data_new.txt");
-			Console.WriteLine("Дані були успішно переписані у файл data_new.txt");
+			WriteData(ProcessData(students), "data_new.txt");
+			Console.WriteLine("Дані були успішно записані у файл data_new.txt");
+		}
+
+		static void Var10(List<Student> students)
+		{
+			foreach (var student in Filter(students, IsTalentedPhysician))
+				Console.WriteLine($"{student.surName} {student.firstName} {student.patronymic} {EvalAverage(student):0.0} {student.scholarship}");
+		}
+
+		static void Var24(List<Student> students)
+		{
+			var summer_kids = Filter(students, IsSummer);
+			foreach (var dude in summer_kids)
+				Console.WriteLine($"{dude.surName} {dude.firstName} {EvalAverage(dude)}");
 		}
 
 		static List<Student> ProcessData(List<Student> students)
 		{
-			List<Student> processedStudents = new List<Student>();
+			List<Student> processedStudents = [];
 
 			foreach (var student in students)
 			{
@@ -19,7 +33,8 @@ static List<Student> ProcessData(List<Student> students)
 				else if (sex == 'F' || sex == 'ж' || sex == 'Ж')
 					sex = 'Ж';
 
-				Student processedStudent = new Student {
+				Student processedStudent = new()
+                {
 					surName = student.surName,
 					firstName = student.firstName,
 					patronymic = student.patronymic,
@@ -39,7 +54,7 @@ static void WriteData(List<Student> students, string filename)
 		{
 			try
 			{
-				using (StreamWriter writer = new StreamWriter(filename))
+				StreamWriter writer = new(filename);
 				{
 					foreach (var student in students)
 					{
@@ -54,7 +69,28 @@ static void WriteData(List<Student> students, string filename)
 				Console.WriteLine($"Помилка запису у файл: {e.Message}");
 			}
 		}
-		static void Var10(List<Student> students) { }
-		static void Var24(List<Student> students) { }
-    }
-}
+
+		public static IEnumerable<Student> Filter(List<Student> students, Func<Student, bool> Condition)
+		{
+			return students.Where(Condition);
+		}
+
+		private static bool IsSummer(Student student)
+		{
+			int month = int.Parse(student.dateOfBirth[3..4]);
+			return month >= 6 && month <= 8;
+		}
+
+		private static bool IsTalentedPhysician(Student student)
+		{
+			return student.Marks[1] == '5';
+		}
+
+		public static double EvalAverage(Student student)
+		{
+			double sum = 0;
+			foreach (var c in student.Marks) sum += (c == '-') ? 2 : double.Parse(c.ToString());
+			return Math.Round(sum / 3, 1);
+		}
+	}
+}