public static void Print(Student[] arr)
{
foreach (var item in arr)
{
Console.WriteLine(item.FirstName+" "+item.LastName+" "+ item.Age);
}
}
public static Student[] DescendingOrder(Student[] students)
{
var ordered = from student in students
orderby student.FirstName ascending, student.LastName ascending
select student;
return students.ToArray();
}
public static Student[] AgeRange(Student[] students)
{
var result = from st in students
where st.Age >= 18 && st.Age <= 24
select st;
return result.ToArray();
}
public static Student[] FirstBeforeLast(Student[] students)
{
var result = from st in students
where st.FirstName.CompareTo(st.LastName) < 0
orderby st.FirstName
select st;
return result.ToArray();
}
static void Main()
{
Student[] students = new Student[3];
students[0] = new Student("Nikolai", "Mishev", 22);
students[1] = new Student("Pesho", "Gotsev", 25);
students[2] = new Student("Anelia", "Ivanova", 19);
Console.WriteLine("Problem 3:");
var firstBeforeLast = FirstBeforeLast(students);
Print(firstBeforeLast);
Console.WriteLine("Problem 4:");
var ageRange = AgeRange(students);
Print(ageRange);
Console.WriteLine("Problem 5:");
var descending = DescendingOrder(students);
Print(descending);
}