import java.util.Scanner;


public class CalcV2 {

    public static final Scanner userInput = new Scanner(System.in);
    private static int[] numbers = new int[2];

    public static void main(String[] args) {

        int choice;

        System.out.println("Calculator");
        System.out.println("\nChoose your calculation:");
        System.out.println("\n1. Addition");
        System.out.println("2. Subtraction");
        System.out.println("3. Multiplication");
        System.out.println("4. Division");
        System.out.print("\nYour Choice: ");
        choice = userInput.nextInt();

        switch(choice) {
        case 1:
            performAddition();
            break;
        case 2:
            performSubtraction();
            break;
        case 3:
            performMultiplication();
            break;
        case 4:
            performDivision();
            break;
        }

    }

    private static int[] getNumbers(){
        int[] numbers = new int[2];
        System.out.print("\nFirst Number: ");
        numbers[0] = userInput.nextInt();
        System.out.print("\nSecond Number: ");
        numbers[1] = userInput.nextInt();
        return numbers;
    }

    public static void performAddition(){
        numbers = getNumbers();
        System.out.println("\nAddition");
        System.out.println("\n" + numbers[0] + " + " + numbers[1] + " = " + (numbers[0] + numbers[1]));
    }

    public static void performSubtraction(){
        numbers = getNumbers();
        System.out.println("\nSubtration");
        System.out.println("\n" + numbers[0] + " - " + numbers[1] + " = " + (numbers[0] - numbers[1]));
    }

    public static void performMultiplication(){
        numbers = getNumbers();
        System.out.println("\nMultiplication");
        System.out.println("\n" + numbers[0] + " x " + numbers[1] + " = " + (numbers[0] * numbers[1]));
    }

    public static void performDivision(){
        numbers = getNumbers();
        System.out.println("\nSubtraction");
        System.out.println("\n" + numbers[0] + " / " + numbers[1] + " = " + (numbers[1] / numbers[0]));
    }
}