1> Discuss the concept of parameters. What are parameters for? What is the difference between formal


Discuss the concept of parameters. What are parameters for? What is the difference between formal parameters and actual parameters? Give an example in Java code that illustrates formal parameters and actual parameters.

Don't use plagiarized sources. Get Your Custom Essay on
1> Discuss the concept of parameters. What are parameters for? What is the difference between formal
Just from $10/Page
Order Essay


attached programming file

CS 1102 – Unit 3 Programming Assignment

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

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 =

• 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.
static int nQuestions = 0;
static int nCorrect = 0;

• 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

Place your order
(550 words)

Approximate price: $22

Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
The price is based on these factors:
Academic level
Number of pages
Basic features
  • Free title page and bibliography
  • Unlimited revisions
  • Plagiarism-free guarantee
  • Money-back guarantee
  • 24/7 support
On-demand options
  • Writer’s samples
  • Part-by-part delivery
  • Overnight delivery
  • Copies of used sources
  • Expert Proofreading
Paper format
  • 275 words per page
  • 12 pt Arial/Times New Roman
  • Double line spacing
  • Any citation style (APA, MLA, Chicago/Turabian, Harvard)

Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

Read more

Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

Read more

Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.

Read more

Privacy policy

Your email is safe, as we store it according to international data protection rules. Your bank details are secure, as we use only reliable payment systems.

Read more

Fair-cooperation guarantee

By sending us your money, you buy the service we provide. Check out our terms and conditions if you prefer business talks to be laid out in official language.

Read more

Order your essay today and save 30% with the discount code ESSAYSHELP