using System;

public class Student 
{
	private string id;
	private string name;
	private int age;
	private string major;

	public  Student(string i, string n, int a, string m) 
	{
		id = i; name = n; age = a; major = m;
	} 
	
	public override String ToString() 
	{
		return id + "\n" + name + "\n" + age + "\n" + major + "\n";
	}
}

public class StudentDatabase
{	
	private Student[] allStudents;
	private int studentNum = 0;

	public StudentDatabase(int size)
	{
		allStudents = new Student[size];
	}

	public Student AddStudent(string sinfo)
	{
		if(studentNum == allStudents.Length)
		{
			Console.WriteLine("Sorry, Maximum capacity is reached.");
			return null;
		}

		char[] seperator = {','};
		string[] split = sinfo.Split( seperator );
		
		string[] fields =  new string[split.Length];		
		int count = 0;
		foreach (string s in split) 
		{
			if (s.Trim() != "")
				fields[count++] = s.Trim();
		}

		string i, n, a, m;		
		i = fields[0];
		n = fields[1];
		a = fields[2];
		m = fields[3];
		Student st = new Student(i, n ,int.Parse(a), m);
		allStudents[studentNum++] = st;
		return st;
	}	

	public void PrintStudents()
	{
		for(int i=0; i < studentNum; i++)
		{
			Console.WriteLine("******************");
			Console.WriteLine(allStudents[i]);
		}
		Console.WriteLine("******************");
	}
	public static void Main()
	{
		StudentDatabase sd = new StudentDatabase(100);
		do
		{
			Console.WriteLine("Please inupt student's id, name, age, major. Seperate fields with ','.");
			string info = Console.ReadLine();

			sd.AddStudent(info);

			Console.Write("Continue? (y or n) : ");
		}while(Console.ReadLine().Trim().ToUpper()=="Y");

		sd.PrintStudents();
	}
}