CIS 340– Business Information Systems Development – I
Assignment: Basic Decisions
Learning Outcomes
1.1. Write if statements with a simple condition.
1.2. Convert strings to numbers and store in integer/double data types. 1.3. Use switch statements to choose between multiple options.
1.4. Perform math operations in Java
Application Overview
You are required to create a tax calculator, which calculates both federal and state tax for an individual. It should prompt the user for his or her gross income and calculate the applicable federal and state income. The total tax, which is the sum of the federal and state tax liabilities is presented back to the user.
Formulas
Net Income = Gross Income – Deduction Federal Tax = Net Income * Federal Tax Rate State Tax = Net Income * 2.5%
Final Tax = Federal Tax + State Tax
© 2017 Altaf Ahmad and Arizona Board of Regents
Calculating the Deduction
The deduction depends on the filing status as follows:
Table 1. Deduction Amounts Calculating the Federal Tax Rate
Filing Status
Deduction ($)
Single (SG)
Married, Filing Jointly (MJ) Married, Filing Separately( MS) Head of Household (HH) Other / Not specified / Error
5,950 11,900 5,950 8,700 0
Net Income
Federal Tax Rate
< $30,000$30,000 to less than $60,000 $60,000 to less than $100,000 $100,000 to less than $250,000 >= $250,000
0% 10% 20% 30% 40%
Table 2. Federal Tax Rates
The following assumption is made for simplification: the tax rate is applied to the full income amount, i.e. if somebody earns $100,000, with their federal tax rate at 30%, the tax will be 100,000 * 0.3 (net income * fed tax rate)
Calculating the State Tax
State Tax is applied at a constant rate of 2.5% of net income.
Calculating the Final Tax
The final tax liability is the sum of the federal and state income tax.
© 2017 Altaf Ahmad and Arizona Board of Regents
Sample Output
© 2017 Altaf Ahmad and Arizona Board of Regents
Instructions (Pseudocode)
Implement the following as a Java application. Name your Class TaxCalculator.java
This following instructions are “pseudocode,” i.e., detailed instructions but not the actual code. Pseudocode is helpful because it shows the logical progression that is needed for a program to work – however, it is “easier” to write since it is English rather than programming language code.
1. Declare and initialize variables for gross income, deduction, and net income. Decide what data type is best suited for the variables.
2. Declare and initialize variables for federal tax, state tax, and income tax. Decide what data type is best suited for the variables.
3. Declare and initialize a variable to store the filing status code. Decide what data type is best suited for the variables.
4. Declare and initialize a Scanner object to read input using System.in
5. Write the header information and welcome message to the screen.
6. Prompt the user for his/her gross income.
7. Read input and store it in your gross income variable. Remember that nextLine() gives
you a string, not a number. So, when reading numbers, you will always have to “parse”
or convert strings to numbers using Integer.parseInt or Double.parseDouble.
8. Write a list of filing status codes (see sample output). You may use multiple lines or try to create the same format as visible in the sample output using fewer lines and more “
” formatting characters.
9. Read input and store it in your filing status variable.
10. Calculate the deduction based on the filing status. Decide if you should use a switch
structure or a series of if statements – one of the two is to be used and is the best “tool”
for the job.
11. Calculate the net income.
12. Calculate the federal tax based on the formula listed above. You will need to know the
federal tax rate, which is dependent on the net income. If net income is between x and y values, then tax rate will be a. If net income is between p and q values, then tax rate is b, and so on. Decide if you should use a switch structure or a series of if statements – one of the two is to be used and is the best “tool” for the job.
13. Calculate the state tax.
14. Calculate the final income tax.
15. Write the stated income to the screen. Use printf display and format the string. Give
formatting instructions to display only 2 decimal places! Also, prefix a dollar sign.
16. Write the final tax liability to the screen. Format the income as a currency as above.
© 2017 Altaf Ahmad and Arizona Board of Regents
Formatting
Output should be properly formatted and easy to look at. “White space” or “line breaks” should be used to create space between lines that are logically distinct. If the user is asked to enter input, the cursor should wait for input on the same line.
Assignment-specific Submission Instructions (if any)
All CIS 340 submissions must adhere to standards detailed in the following documents available on Blackboard, for full credit.
• CIS 340 Assignment Submission Instructions
• CIS 340 Programming Conventions
• CIS 340 Commenting Guide
General Grading Criteria
1. Assignments will be scored out of 30 points.
2. Assignments will be on source code AND output, with the emphasis on the code.
3. Assume perfect input by user – no input validation is necessary (for now). Also, do not worry about the program crashing due to large numbers. We will handle these issues in the second half of the semester.
Grading Criteria
Points
Input
6
Deduction Calculation & Implementation Choices
5
Tax Rate and Tax Calculations & Implementation Choices
10
Output
6
Style and Standards
CIS 340 & 345 Programming Conventions are followed Class names and zip file names are accurate
Class file has name, class, assignment number, and class time written on Line 1.
White space and line breaks make reading both the source code and output easy to look at as well as easier to read.
Line breaks are entered properly at appropriate locations.
3
© 2017 Altaf Ahmad and Arizona Board of Regents
Reviews
There are no reviews yet.