import java.util.Scanner; // for scanner class
import java.util.Random; // for random class

public class Ex19Random
{
	public static void main(String[] args)
	{
		int number1, number2, sum, userAnswer;
		
		Scanner keyboard = new Scanner(System.in);  //create Scanner object
		Random randomNumbers = new Random();  //create Random object
		
		number1 = randomNumbers.nextInt(100);  //0(inclusive) to 99 (exclusive 100)
		number2 = randomNumbers.nextInt(100);
		
		System.out.println("What is the answer to the following problem?");
		System.out.print (number1 + " + " + number2 + " = ? ");
		
		sum = number1+number2;  //computer correct answer
		userAnswer = keyboard.nextInt();	//get user answer
		
		if (userAnswer == sum)
		{
			System.out.println("Correct!");
		} 
		else
		{
			System.out.println("Sorry, wrong answer. The correct answer is " + sum);
		}
	}
}