CS 139 Algorithm Development PA2: Fine Dining Refactored Part A Due in Canvas by Friday,October 3 at 11:59PM Part B Due in WebCAT by Wednesday, October 8 at 11:59 PM -10% on Thursday, October 9 -20% on Friday, October 10 -35% on Sunday, October 12 -50% on Monday, October 13 Not accepted afterwards Part C due in Canvas by Thursday,October 9 or one day after you have successfully submitted to WebCAT. Part D due in class on Thursday, October 10 or one day after you have successfully submitted to WebCAT.

Objectives - At the conclusion of this assignment students will have demonstrated that they can:

• Input data from a keyboard.
• Use Java math operations.
• Properly format output to specification.
• Do everything necessary to create, debug, and run a java program.
• Use comments to delineate each section of the program.
• Divide a program into smaller more manageable components
• Adhere to a Java Style Guide.
• READ AND FOLLOW DIRECTIONS!!!!!

Background

When dining in a restaurant, patrons are presented with a check for their meal. In this application you will calculate the tax and suggested gratuities for a meal. This application will require you to produce a "check" like you might get in a restaurant.

Requirements

PART A - Graded as a homework assignment. There will be a separate Canvas Assignment for this.

You will stub out a program called BillMakerTools.java. This program will contain the methods outlined below. The stubs must be compilable working stubs such as you built in Lab 05B. They should be fully documented. See specifications below for the required methods in BillMakerTools.java. BillMakerTools will not have a main method except if you build one for testing.

PART B - Submitted to webcat. 

You will write a Java program consisting of BillMaker.java and BillMakerTools.java, that must:

• Prompt for and receive the meal amount using the prompt "How much was the total bill? " and the cursor must remain on the line beside the space following the question mark.
• Prompt for and receive name of the server. The prompt must be of the form, "Who was the server? " and the cursor must remain on the line beside the space following the colon.
• Calculate the tax based on the tax rate of 11.8%.
• Calculate the total bill.
• Calculate three tip amounts, one based on 15% of the meal amount, one based on 18%, and the final one at 20% of the meal amount.
  
• Output a report in the following format:

<blank>
Total bill: $ 88.00
       Tax: $ 10.38
   You owe: $ 98.38
<blank>
Your server was kelly.
   Tip 15%: $ 13.20
   Tip 18%: $ 15.84
   Tip 20%: $ 17.60
<blank>
Thank you for dining with us.

Output MUST conform exactly to that shown. Failure to match it exactly will result in WebCAT errors.  Each line above must end with the new line character directly following the output value and the blank lines <blank> in the output are significant. These lines should not include a blank space character, but should include a single new line character.

A complete dialog (with input values highlighted in red would look like)

How much was the total bill? 100
Who was the server? kelly

<blank>
Total bill: $100.00
       Tax: $ 11.80
   You owe: $111.80
<blank>
Your server was kelly.
   Tip 15%: $ 15.00
   Tip 18%: $ 18.00
   Tip 20%: $ 20.00
<blank>
Thank you for dining with us.

NOTES:

1. Each of the output lines must terminate with a single newline "\n" character with the exception of the input prompts.
2. All of the colons should line up vertically. The T for the total bill will be in the first position and all colons will line up with the one after "bill:".
3. Each line identified by <blank> should have a single newline character and no spaces.
4. All currency amounts must be formatted with a $ followed by up to three digits followed by a decimal point and exactly 2 digits following the decimal place. Valid formatting would look like $ 0.50, $ 12.95, $ 1.50, etc.
5. Your tax rate should be a named constant in the file.

Part B Structure

BillMaker will contain a single method, main which will call all of the other methods in BillMakerTools to perform the calculations and output the results. Nothing should be directly output in BillMaker.

BillMakerTools will have the following methods:

• inputDouble has two parameters, a Scanner object (built in main) and a String prompt. The method should use the prompt to print a message to the user and then read in a double value. Any data remaining on the line should be "consumed" to avoid any conflict with future reads. The double is returned by the method.

• inputString has two parameters, a Scanner object (built in main) and a String prompt. The method should use the prompt to print a message to the suer and then read in a String value. The String is then returned by the method.
• formatBillAmount has one parameter, the amount to format as a double. It returns a String which is the amount formatted as shown in the examples, with a $ followed by 0, 1, or 2 spaces depending on the dollar amount, a decimal point and two digits rounded. NOTE: String has a method, format, which will behave like printf, except that it will not print the value, but instead will return a String.
• formatLabels has two parameters, a String which is the label (in this case like Total bill: or Tax:) and an integer width and will return a new String padded on the left with enough spaces to fill the width. For example, if the String were "Total bill:" and the width was 11, then the return would be the same as the value passed in. If the String were "Tax:" and the width 11, 7 blanks would be put in front of the bill. Note, this can be done without ifs or loops. HINT: Consider a long constant String of blanks. If you need 7 blanks, you can substring the spring to give you only 7 blank spaces which can be concatenated onto the front of the passed String. Work out this calculation on paper before trying to code it.
• calcTax will calculate the tax. This method will take in an amount to be taxed and returns the tax on that amount. The tax rate should be a constant within this method.
• calcTip will calculate the tip. This method will take in an amount of the meal and the tip percentage and will return the amount that the tip should be.
• print will take in a single parameter, the line to print and will output the line.

Part B Deliverables

1. Zip your BillMaker.java and BillMakerTools.java into a zip file. Submit the zip file via Web-CAT (http://webcat.cs.jmu.edu).
2. Your program will be judged on correctness (80%) and conformance to the StyleGuide (20%). The checkoff chart is found here. Deductions for failing to follow the structure will be taken from the 80% correctness score.

Part C, D - Reflection and Pair Programming Log - graded as regular homework assignments. There will be separate Canvas Assignments for this.

You will write a reflection document for this assignment which will let you consider the process of building this program. It will also contain a place to critique this assignment for this class.

In addition, you should keep a log showing how much time you and your partner worked together and how much time you worked alone.

Honor Code

This is a pair programming assignment. You may work with your partner, but may not work with any other team. This assignment should be viewed as a take home exam. Your work on the assignment and your submission must conform to the JMU Honor Code. Authorized help is limited to the classroom handouts, lab material, the TAs for any CS139 or CS 149 section, and either professor. Copying work from another student not in your partnership or the Internet is an honor code violation, which will result in a zero on the assignment and possibly further sanctions. Your work on this assignment is subject to review by MOSS which is a plagiarism detection tool for programs. Submission to WebCAT constitutes your submission of work for academic credit and your agreement that your work may be submitted to MOSS.