import java.util.Scanner;

public class Mennu {
    
    public static void main(String[] args)
    {
        double a=0,b=0,x=0;
        int result=1;
        String imie;
        Scanner skaner = new Scanner (System.in);
        
        while (result > 0 )
        {
            System.out.println("***************************");
            System.out.println("|--------Menu--------------|");
            System.out.println("|----- 1 - powitanie ------|");
            System.out.println("|----- 2 - galony I litry--|");
            System.out.println("|----- 3 - objetosc walca--|");
            System.out.println("|----- 0 - koniec programu-|");
            System.out.println("****************************");
            
            if (skaner.hasNextInt())
            {
                result= skaner.nextInt();
            }
            
            switch (result)
            
            {
                case 1:
                    System.out.println("Podaj swoje imie");
                    
                    imie = skaner.nextLine();
                    imie = skaner.next();
                    System.out.println("Witaj " + imie);
                    break;
                    
                    
                case 2:
                    System.out.println("Wybrales galony i litry");
                    System.out.println("Podaj liczbe galonow a = ");
                    a = skaner.nextInt();
                    b=a*3.7854;
                    System.out.println(a + " galonow to  " +b + " litrow.");
                    break;
                    
                    
                case 3:
                    System.out.println("Objetosc walca");
                    System.out.println("Podaj promien walca a = ");
                    a = skaner.nextInt();
                    System.out.println("Podaj wysokosc walca b = ");
                    b = skaner.nextInt();
                    x =3.14*a*a*b;
                    System.out.println("Objetosc walca o promieniu "+ a +" i wysokosci " + b+ " wynosi " + x);
                    break;
                    
                    
                case 0:
                    System.out.println (" podales " + x);
                    System.out.println("Wychodze z programu");
                    break;
                    
                default:
                    System.out.println("Nieprzewidziana sytuacja");
            }
        }
    }
}