CSci 49, Project 3

School of Engineering and Applied Science
Department of Computer Science
CSci 49 -- Introduction to C Computing
http://www.seas.gwu.edu/~csci49/spring06
Prof. Michael B. Feldman
mfeldman@gwu.edu

Project #3
Due Date: Start of lecture, Thursday, Feb. 23, 2006

Problem Specification:

It's income-tax season, so this project focuses on taxes. The Federal tax system is "progressive": your tax rate increases as your taxable income increases. Here's the 2005 rate table for unmarried taxpayers:

TAXABLE INCOME
MORE THAN	NOT MORE THAN	AMOUNT OF TAX
$0	$2,650.00	$0.00 plus 0.0% of amount over $0.00
2,650.00	9,800.00	0.00 plus 10.0% of amount over 2,650.00
9,800.00	31,500.00	715.00 plus 15.0% of amount over 9,800.00
31,500.00	69,750.00	3,970.00 plus 25.0% of amount over 31,500.00
69,750.00	151,950.00	13,532.50 plus 28.0% of amount over 69,750.00
151,950.00	328,250.00	36,548.50 plus 33.0% of amount over 151,950.00
328,250.00	AND OVER	94,727.50 plus 35.0% of amount over 328,250.00

As you can see from this table, these are "marginal" rates: different "chunks" of your income are taxed at different rates. For example, if your taxable income is $50,000, the chunk between $31,500 and $50,000 is taxed at $25%; the chunk between $9800 and $31,500 is taxed at 15%, etc.

In this project, you are to develop a program that prompts the user for a floating-point value that represents taxable income, then calculates and displays the amount of tax and the net income after taxes. Build the above tax table into your program as a nested if structure.

What to submit:

You must follow the process given in Systematic Software Development. Submit

a copy of this page as a problem specification
a paper document (from a word processor or neatlyhand written) that presents the analysis, design, and test plan for your project
a printout of the listing (.txt) file for your program in its final stage
a printout of a turnin file of your test runs, showing that you tested the program according to the test plan

Your grade will be calculated on a 20-point basis, as follows:

6 points -- analysis and design (including algorithm in structured English)
4 points -- test plan
6 points -- correct execution of program according to test plan
4 points -- layout and style of program source code

Extra credit bonus:

This extra credit bonus is to provide an incentive for starting your project early in the week.If you e-mail your "framework" listing file to Prof. Feldman, and the time stamp on the e-mail is no later than 5 PM, Monday, Feb. 20, 2006, you will be awarded 2 extra project points. The "framework" must be a listing (.txt) file, with no compilation errors, that contains the declared variables, and a set of comments inserted for the main algorithm steps. E-mail the file as you did the survey form, e.g.,pine mfeldman <IncomeTax.txt

MBF 2/13/06

Project #3 Due Date: Start of lecture, Thursday, Feb. 23, 2006

Problem Specification:

What to submit:

Extra credit bonus:

Project #3
Due Date: Start of lecture, Thursday, Feb. 23, 2006