Answer to Question #237356 in Java | JSP | JSF for shawn

Question

12.8 (LAB) Fun With Branching - FINAL

For this project you will write a Java program that will run a simple math quiz. Your program will generate two random integers between 1 and 20 and then ask a series of math questions. Each question will be evaluated as to whether it is the right or wrong answer. In the end a final score should be reported for the user. (See below for how to generate random numbers).

Sample Ouptut This is a sample transcript of what your program should do. Values in the transcript in BOLD show the user inputs. So in this transcript the user inputs 33, Jeremy, 24, -16, and 80 the rest is output from the program.

Answer 1

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

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double x = new Random().nextInt(20) + 1;
        double y = new Random().nextInt(20) + 1;
        double answer;
        int correctAnswers = 0;
        String[] questions = {x + "+" + y + "=", x + "-" + y + "=", x + "*" + y + "=", x + "/" + y + "=",};
        for (int i = 0; i < questions.length; i++) {
            System.out.print(questions[i]);
            while (true) {
                try {
                    answer = Double.parseDouble(in.nextLine());
                    switch (i) {
                        case 0:
                            if (answer == x + y) {
                                correctAnswers++;
                                System.out.println("Correct.");
                            } else {
                                System.out.println("Incorrect.");
                            }
                            break;
                        case 1:
                            if (answer == x - y) {
                                correctAnswers++;
                                System.out.println("Correct.");
                            } else {
                                System.out.println("Incorrect.");
                            }
                            break;
                        case 2:
                            if (answer == x * y) {
                                correctAnswers++;
                                System.out.println("Correct.");
                            } else {
                                System.out.println("Incorrect.");
                            }
                            break;
                        case 3:
                            if (answer == x / y) {
                                correctAnswers++;
                                System.out.println("Correct.");
                            } else {
                                System.out.println("Incorrect.");
                            }
                            break;
                    }
                    break;
                } catch (NumberFormatException e) {
                    System.out.println("Enter a number!");
                }
            }
        }
        System.out.println(correctAnswers + "/" + questions.length);
    }
}