Question

This problem will give you hands-on practice with the following programming concepts: • All programming structures (Sequential, Decision, and Repetition) • Methods • Random Number Generation (RNG) Create a Java program that teaches people how to multiply single-digit numbers. Your program will generate two random single-digit numbers and wrap them into a multiplication question. The program will provide random feedback messages. The random questions keep generated until the user exits the program by typing (-1). For this problem, multiple methods must be used. You can’t put all the code in one method. For example, you can create a void method to generate a random message for correct answers and another method to generate a message for incorrect answers. You can also create a method to generate the random questions, etc. Name your class as Q4Multiplication.java The sample run below shows you the behavior of this program:

For this question, I see an answer already posted on site but when I was studying it, I found out that the question says use multiple methods, Everything in the posted answer is crammed into the main method and so how do I break it into multiple methods??

Answer 1

Following is the program for the same in JAVA

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

public class Q4Multiplication {
   public static int randomNumber() {
       Random rand = new Random();
       int n = rand.nextInt(9) + 1;
       return n;
   }
   // Matching whether the solution matches with input
   public static void matchAnswerWithSolution(int userInput, int solution) {
       if(userInput == solution) {
           System.out.println("Correct answer");
       }else {
           System.out.println("Incorrect answer" + "\nCorrect answer is: " + (solution));
       }
   }
   // Taking the input
   public static int scanInt() {
       Scanner scan = new Scanner(System.in);
       return scan.nextInt();
   }
   // Printing the question by getting the random numbers
   // and returning the solution of multiplication from the function
   public static int printQuestion() {
       int randomNumber1 = randomNumber();
       int randomNumber2 = randomNumber();
       System.out.println("Enter the multiplication of: " + randomNumber1 + " and " + randomNumber2);
       return randomNumber1*randomNumber2;
   }
   // Main function
   public static void main(String args[]) {
       boolean enter = true;
       while(enter) {
           int solution = printQuestion();
           int userInput = scanInt();
           if(userInput == -1) {
               enter = false;
               break;
           }else {
               matchAnswerWithSolution(userInput, solution);
           }
       }
   }
}

Following is the snippet of the output.

That was a nice question to answer
Friend, If you have any doubts in understanding do let me know in the comment section. I will be happy to help you further.
Thanks