import java.util.Scanner;


public class MenuHitung {

    public static Scanner scanner = new Scanner(System.in);

    public static void hitungVolumeKubus() {
        double sisi;
        double volume;

        System.out.print("Masukkan sisi: ");
        sisi = scanner.nextDouble();

        volume = sisi * sisi * sisi;
        System.out.println("Volume kubus = "+volume);

    }

    public static void hitungVolumeBola() {
        double jariJari;
        double volume;

        System.out.print("Masukkan jariJari: ");
        jariJari = scanner.nextDouble();

        volume = 4d / 3d * 3.14 * jariJari * jariJari * jariJari;
        System.out.println("Volume bola = "+volume);

    }

    public static void hitungVolumeKerucut() {
        double jariJari;
        double tinggi;
        double volume;

        System.out.print("Masukkan jariJari: ");
        jariJari = scanner.nextDouble();
        System.out.print("Masukkan tinggi: ");
        tinggi = scanner.nextDouble();

        volume = 1d / 3d * 3.14 * jariJari * jariJari * tinggi;
        System.out.println("Volume kerucut = "+volume);

    }

    public static void main(String[] args) {

        boolean valid;
        int pilihan;

        valid = true;
        pilihan = 0;

        do {

            if(!valid){
                System.out.println("Pilihan salah");
                System.out.println();
            }

            System.out.println("== Menu Hitung Bangun Ruang ==");
            System.out.println("1. Kubus");
            System.out.println("2. Bola");
            System.out.println("3. Kerucut");
            System.out.println("==============================");
            System.out.print("Masukkan pilihan: ");

            pilihan = scanner.nextInt();

            switch (pilihan) {
            case 1:
                hitungVolumeKubus();
                valid = true;
                break;
            case 2:
                hitungVolumeBola();
                valid = true;
                break;
            case 3:
                hitungVolumeKerucut();
                valid = true;
                break;
            default:
                valid = false;
                break;
            }

        } while (!valid);

    }

}