static void Main(string[] args)
{
//Input
Console.WriteLine("Enter number of students: ");
int n = int.Parse(Console.ReadLine());
StudentInfo[] listOfStudents = new StudentInfo[n];
for (int i = 0; i < n; i++)
{
StudentInfo oneStudent = new StudentInfo();
Console.Write("First name: ");
oneStudent.firstName = Console.ReadLine();
Console.Write("Second name: ");
oneStudent.secondName = Console.ReadLine();
Console.WriteLine("Enter age: ");
oneStudent.age = byte.Parse(Console.ReadLine());
listOfStudents[i]=oneStudent;
}
//Query 1 - First name before Last
var sortedList =
from student in listOfStudents
where student.firstName.CompareTo(student.secondName) == -1
select student;
Console.WriteLine("These students have such names");
foreach (var student in sortedList)
{
Console.WriteLine("{0} {1}",student.firstName,student.secondName);
}
//Query 2 - Of age 18-24
var youngStudents =
from student in listOfStudents
where student.age >= 18 && student.age <= 24
select student;
foreach (var student in youngStudents)
{
Console.WriteLine("{0} {1} is between 18 and 24 years old",student.firstName,student.secondName);
}
//Sort with lambda
var lamdaSorted = listOfStudents.OrderBy(firstName => firstName.firstName).ThenBy(firstName => firstName.secondName);
foreach (var stud in lamdaSorted)
{
Console.WriteLine("{0} {1} is sorted by first and last name with Lambda exp ",stud.firstName,stud.secondName);
}
//Sort with linq
var linqSorted =
from student in listOfStudents
orderby student.firstName
orderby student.secondName
select student;
foreach (var stud in lamdaSorted)
{
Console.WriteLine("{0} {1} is sorted by first and last name with LINQ ", stud.firstName, stud.secondName);
}
}
