Programming Lab 1: Sales Tax

Objective: To write a program to output a formatted tax report to a file

A retail company must file a monthly sales tax report listing the sales for the month and the amount of sales tax collected. Write a program that asks for the month, the year, and the total amount collected at the cash register (that is, sales plus sales tax). Assume the state sales tax is 4 percent and the county sales tax is 2 percent. Those are percentages of pre-tax prices (S, or "product sales" below).

If the total amount collected is known and the total sales tax is 6 percent, the amount of product sales may be calculated as:

S = T/1.06

S is the product sales and T is the total income (product sales plus sales tax). 1.06 comes from the total of 6% sales tax.

The program should save a text file containing a report on the month's sales and tax, as shown below.

Here is a sample of how the program should behave. It displays the name of the text file (SalesTaxData.txt), so the user knows where to find the report. To actually see the report, the user has to look at that file. (Remember the Unix command "cat" displays the contents of a text file.)

bash-2.04$ a.out
Please enter the month for this report: February
Please enter the year for this report: 2005
Please enter the total income for this month: 15000.25
Sales Tax Report Saved to file: SalesTaxData.txt

bash-2.04$ cat SalesTaxData.txt

Month:   February 2005
-----------------------
Total Collected:       $ 15000.25
Sales:                 $ 14151.18
County Sales Tax:      $   283.02
State Sales Tax:       $   566.05
Total Sales Tax:       $   849.07
-----------------------

bash-2.04$ a.out
Please enter the month for this report: October
Please enter the year for this report: 2004
Please enter the total income for this month: 26572.89
Sales Tax Report Saved to file: SalesTaxData.txt

bash-2.04$ cat SalesTaxData.txt

Month:    October 2004
-----------------------
Total Collected:       $ 26572.89
Sales:                 $ 25068.76
County Sales Tax:      $   501.38
State Sales Tax:       $  1002.75
Total Sales Tax:       $  1504.13
-----------------------

Rules:

• The file name is not typed in by user, and the file is not displayed by the program. The line "Sales Tax Report Saved to file: SalesTaxData.txt" is output by the program just before the program ends, to inform the user that the sales tax report has been saved to a file.
• Make sure your output is formatted as shown above, with decimal points lining up and 2 digits after the decimal.
• You should turn in your program's source (C++) code and the output it produced after you compiled and ran it. Make sure to include both the console screen output, and the file output, for both cases shown above.
• The file you submit must be in plain text format, with a file extension of either .txt or .cpp or no extension.
• Like with Practice Problem 2, you must turn in the text of both the source code and the sample output. For this assignment I want to see both of the test cases shown above.
• Make sure to put a comment at the top of your program with your name, the name of your C++ source file, the name of this assignment and class (110A Programming Lab 1), and a brief description of what the program does.
• Please follow the standard conventions for indentation, meaningful variable names, etc. like the examples in class and in the textbook.
• Make sure to submit your homework using Insight.

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