SubtractionQuiz (Math.random())

import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int count = 0;
        int correct = 0;
        int num1 = 0 , num2 = 0;
        while (count != 4) {
            int n1 = (int) (Math.random() * 10);
            int n2 = (int) (Math.random() * 11);
            if (n1<n2){
                num1 = n2;
                num2 = n1;
            }
            System.out.printf("What is %d - %d = ",num1,num2);
            int answer = input.nextInt();
            if (num1-num2 == answer) {
                System.out.println(num1 + "-" + num2 + "=" + answer + " is " + (num1 - num2 == answer));
                correct +=1;
            }
            else
                System.out.println(num1 + "-" + num2 +"="+ answer +" is "+ (num1-num2 == answer));
            //counter
            count += 1;
        }
        if (correct>2){
            System.out.println("Correct answers: "+correct);
        }

    }
}