CS 1102 Unit 3 Programming Assignment 345962

Cs 1102 Unit 3 Programming Assignment In This Assignment You Wi

In this assignment, you will modify your Quiz class from the previous assignment. You will create a method that asks a quiz question and a method that checks the answer, and you will use those methods to ask multiple questions. Your program will then report how many questions the user got correct. This program will be the basis for future Programming Assignments in this course. These instructions assume that you are using the Eclipse IDE on your own computer or you may use a different Java environment as long as you can provide Java code and screen shots for your assignment submission.

First open your previous Programming Assignment in Eclipse, with the file "Quiz.java" in the editor pane.

Add a static method that asks a question until the user provides valid input.

Call the method "ask". It should take a String parameter, and it should return a String.

static String ask(String question) {

Remember where method definitions go: inside the class (in this case, "Quiz") but outside all other method definitions (like "main"). It can go before or after the "main" definition.

Ask the user the question repeatedly until the user provides a valid answer: "A", "B", "C", "D", or "E".

Ask the question using "JOptionPane.showInputDialog".

Allow the user to provide a lower-case answer, and convert it to upper case.

If the user provides an invalid answer, use "JOptionPane.showMessageDialog" to tell them, "Invalid answer. Please enter A, B, C, D, or E." Then ask the question again. Repeat until the answer is valid.

Once the user provides a valid answer, return that answer (converted to upper case).

Notice that the method does not check whether the answer is correct. It just asks the same question until the answer is valid. Try out your new method.

Delete the existing loop from your main method, but leave the initialization of the question String.

Call the "ask" method with your question String as the argument (actual parameter).

Note that you do not have to use the String returned by "ask".

Run your program. It should keep asking the question until you provide a valid answer.

It does not yet check the answer. Try invalid and valid answers.

Now add a method that asks questions using "ask" and checks answers.

Call the method "check". It should take two String parameters.

static void check(String question, String correctAnswer) {

The method definition can go before, after, or between the definitions for "ask" and "main", but it must be inside the "Quiz" class and outside the other method definitions.

In the "check" method, call "ask" to get a valid answer. String answer = ask(question);

If the answer is correct, use "JOptionPane.showMessageDialog" to report, "Correct!"

If the answer is incorrect, use "JOptionPane.showMessageDialog" to report, "Incorrect. The correct answer is ." This output should include the actual correct answer.

Test the "check" method. Replace the "ask" call in the main method with a "check" call. You will need to provide both the question String and the answer String as arguments.

Run your program. It should keep asking the question until you provide a valid answer. Then it should tell you if your answer is correct.

Try invalid, incorrect, and correct answers. Add more questions.

In the main method, call "check" with at least two more unique quiz questions, each with a different correct answer, for a total of at least three questions.

You may either declare and initialize new local variables or reassign the existing question variable after each "check" call.

Run your program. Make sure the responses work as expected for all the questions.

Finally, add a score for the quiz. Add two static member variables, one for the number of questions and one for the number of correct answers. Initialize them to zero for good documentation.

Remember where member variables go: inside a class definition but outside all method definitions. You may declare the variables before, after, or between the existing methods.

In the "check" method, increment "nQuestions" each time it is called. Also in the "check" method, increment "nCorrect" for each correct answer.

Display the score at the end of the main method using "JOptionPane.showMessageDialog". Use the text, " correct out of questions", with the appropriate numbers.

Run your program. Make sure it displays the right numbers of questions and correct answers.

Paper For Above instruction

Introduction

Creating effective quizzes is a fundamental aspect of computer-assisted learning and assessment. Java offers versatile tools for developing interactive quiz applications that can enhance student engagement and provide immediate feedback. This paper discusses the development of a Java-based quiz application, focusing on the modification of a previous Quiz class to include methods for asking questions, validating user responses, and tracking quiz scores. The approach emphasizes user input validation, modular programming, and score reporting, contributing to a robust learning tool.

Design and Implementation of the Quiz Class

The core of the quiz application involves enhancing the existing Quiz class to include two key static methods: ask and check.

1. The ask method

The ask method is responsible for prompting users with a question and ensuring that the response is valid. It takes a string parameter representing the question text and repeatedly asks the question using JOptionPane.showInputDialog until the user enters a valid answer ("A", "B", "C", "D", or "E"). The method converts the user's input to uppercase, facilitating case-insensitive validation. If invalid input is received, a message dialog informs the user, prompting re-entry.

2. The check method

The check method utilizes the ask method to solicit an answer, compares it with the correct answer, and provides immediate feedback. If the user’s answer matches the correct answer, a message dialog congratulates the user; otherwise, it informs them of the correct response. This method also increments the total question count and the count of correct answers for scoring purposes.

Adding User Input Validation

Effective input validation ensures that the quiz application handles user responses gracefully. The ask method employs a loop to repeatedly prompt the user until a valid answer is provided, which prevents invalid inputs from affecting the quiz logic. It also manages case insensitivity, enhancing user experience. This design aligns with best practices in user interface programming, ensuring robustness and reliability.

Managing Multiple Questions

The program's architecture allows for multiple questions by invoking the check method multiple times from the main method, each with different question prompts and correct answers. This modular structure simplifies the addition of new questions. After each question, the program updates the score counters, maintaining accurate tracking of user performance.

Score Calculation and Presentation

To provide meaningful feedback, the program maintains static variables for total questions asked and total correct answers. After all questions are completed, these metrics are displayed to the user via JOptionPane.showMessageDialog, formatted to indicate the number of correct answers out of total questions. This feature offers immediate, quantifiable feedback on user performance.

Conclusion

The development of a Java quiz application demonstrates the importance of modular design, input validation, and real-time feedback in educational software. By extending the Quiz class with methods for asking questions, validating responses, and tracking scores, the application becomes a flexible and effective assessment tool. Future enhancements could include adding GUI components beyond JOptionPane, such as customized interfaces or question banks, to further improve user interaction.

References

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• JOptionPane Class Documentation. Oracle Documentation. (2023). https://docs.oracle.com/javase/8/docs/api/javax/swing/JOptionPane.html
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