import java.util.Scanner;


public class lab1 {
	 public static void main(String[] args)
	  {
	    PrintMyName print = new PrintMyName();
	    Root roots = new Root();
	    Square square = new Square();
	    StudentGrade grade = new StudentGrade();

	    System.out.println("Enter the number from 1 to 4: ");
	    Scanner in = new Scanner(System.in);
	    int n = in.nextInt();
	    if ((n >= 1) && (n <= 4))
	    {
	      if (n == 1)
	      {
	        System.out.println("Print My Name: ");
	        print.Print();
	      }
	      if (n == 2)
	      {
	        System.out.print("Enter your grade: ");
	        int num = in.nextInt();
	        grade.Grade(num);
	      }
	      if (n == 3)
	      {
	        System.out.println("Enter the length of the side of the square: ");
	        double length = in.nextDouble();
	        square.ArPrDg(length);
	      }
	      if (n == 4)
	      {
	        System.out.print("Enter a, b, c: ");
	        int a = in.nextInt();
	        int b = in.nextInt();
	        int c = in.nextInt();
	        roots.Find(a, b, c);
	      }
	    }
	    in.close();
	  }
}