static void Main(string[] args)
{
//int[] array = new int[] { 1, 2, 3, 4 };
//int[][] jagged = { new int[] { 1, 2, 3 }, new int[] { 1 }, new int[] { 5, 5, 5, 5, 5 } };
//int[,] arr =new int[,] { { 1, 2, 3 }, { 4, 5, 6 } };
//int l = arr.GetLength(1);
//Student student = new Student("Ivan Petrov", 25);
//Student student1 = new Student();
//Student student2 = new Student(student);
//Console.WriteLine(student.ToString());
//Console.WriteLine(student1);
//Console.WriteLine(student2);
//Random rnd = new Random();
//int[] arr2 = new int[] { 1, 2, 3, 4 };
//int[] arr3 = new int[arr2.Length];
//Array.Copy(arr2, arr3, arr2.Length);
//arr3[0] = 777;
//Console.WriteLine(arr2[0]);
//Console.WriteLine(arr3[0]);
Student student5 = new Student("Ivan Petrov",24,1600);
Console.WriteLine(student5.AgeInFee());
Console.WriteLine("The first letter of the name is {0}", student5.Firstchar());
Console.WriteLine("Fee: {0}", student5.Fee);
StudentExtension.IncreaseFee(student5, 15);
Console.WriteLine("Fee increased with 15%: {0}", student5.Fee);
Student one = new StudentExt("Georgi", 24, 1600,"Male");
one.Talk();
}
