import java.util.Random;
import java.util.Scanner;

public class AdditionQuiz3 {

    public static void main(String args[]) {

        Random random = new Random();
        Scanner in = new Scanner(System.in);
        String ans;

        do {
            int n1 = random.nextInt(10);
            int n2 = random.nextInt(10);

            System.out.print(n1 + " + " + n2 + " = ");
            int sum = in.nextInt();

            boolean correct = (n1 + n2 == sum);

            String msg = n1 + " + " + n2 + " = " + sum;
            if (correct)
                msg += " is correct";
            else
                msg += " is incorrect";
            System.out.println(msg);

            System.out.print("Do you want to try another one? [Y|N]: ");
            ans = in.next();
        } while (ans.equalsIgnoreCase("Y"));

        System.out.println("Quiz closed.");
        in.close();
    }

}