Chapter 3 Exercise 2, Introduction to Java Programming, Tenth Edition Y. Daniel LiangY.

3.2 (Game: add three numbers) The program in Listing 3.1, AdditionQuiz.java, generates two integers and prompts the user to enter the sum of these two integers. Revise the program to generate three single-digit integers and prompt the user to enter the sum of these three integers.

import java.util.Scanner;
 
public class ProgrammingEx3_2 {
 public static void main(String[] args) {
  int number1 = (int) (System.currentTimeMillis() % 10);
  int number2 = (int) (System.currentTimeMillis() * 7 % 10);
  int number3 = (int) (System.currentTimeMillis() * 13 % 10);
  // Create a Scanner
  Scanner input = new Scanner(System.in);
 
  System.out.print("What is " + number1 + " + " + number2 + " + "
    + number3 + "? ");
 
  int answer = input.nextInt();
 
  System.out.println(number1 + " + " + number2 + " + " + number3 + " = " + answer
    + " is " + (number1 + number2 + number3 == answer));
 }
}