i need a C++ programming project
ABDUL95Shr
project_1.pdf
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CPSC 120
Fall 2015
Project #1 — UPC check digits
Introduction
In this project you will write a C++ program that calculates the check digit
for a 12-digit UPC code.
Background
A Uniform Product Code (UPC) is a 12-digit number that identifies a product
sold at a grocery store. UPC codes are often called bar codes because they
are printed as an arrangement of bars:
The digits are grouped into a single digit to the left of the bars; then five
digits together; then another five; then the final digit t o the right of the
bars. In the example above, the 12 digits are 9 87654 32109 8.
The final digit ( 8 in the example above) is a check digit. The first eleven
digits describe what the product is. The last digit is calculated based on
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the values of the first digits. This is a way of checking whether the code
is valid and has been transcribed properly. Checkout machines can verify
that a UPC code was scanned correctly by confirming whether the check
digit matches what it should be.
Let the first eleven digits be called d1, d2, d3, . . . d11. Then the check digit
may be calculated according to the following expression:
10 − [(3 · (d1 + d3 + d5 + d7 + d9 + d11) + d2 + d4 + d6 + d8 + d10) mod 10]
where mod represents the modulo operator, written as % in C++.
What to do
The program
Write a program that does the following:
1. Asks the user to enter 11 individual digits. Read each digit as a separate
number; do not read a single 11-digit number, as that would not fit in
an int.
2. Print out the digits. Insert a space after the first and sixth digit, so that
the digits appear grouped as they do on a UPC code (see examples,
below).
3. Calculate the check digit. It is OK if a check digit o f 0 gets printed
as 10. (Avoiding this requires if statements, which we haven’t quite
covered yet.)
You can assume that the user enters a valid, n o n -negative, single-digit
number for each input.
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Pseudocode Before writing C++ code, draw a flowchart or complete your pseudocode for the process. This will help you understand how to break up the program into smaller, manageable parts. Your Pseudocode/Flowcharts should include steps for reading each digit of input, calculating the check code, and printing the check code. Think about whether any of those steps need to be broken into smaller steps.
Examples
The following is an example of correct input and output for the example
UPC code printed earlier: Enter 11 digits:
9
8
7
6
5
4
3
2
1
0
9
11 digits: 9 87654 32109
check digit: 8
Note that the check digit, 8, matches the last digit printed along with the
bar code on page 1.
Another example, from a can of coffee:
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Enter 11 digits:
0
4
3
0
0
0
0
2
9
4
1
11 digits: 0 43000 02941
check digit: 1
What to turn in
Your submission will be a written report, submitted electronically as a PDF
file through TITANium. Your report should include
1. Your Pseudocode 2. Your C++ source code
3. Input and output for the first example, 9 87654 32109.
4. Input and output for the second example, 0 43000 02941.
5. A third set of inputs and outputs, for a different UPC code. Find a real
world product and use its bar code.
6. Answer the following short-answer questions:
(a) What product does your UPC code come from?
(b) Does the final digit printed on the bar code match the check digit
that your program computed?
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(c) The check digit system makes bar code scanners more reliable, by
double-checking their work. Can you think of another system that
would benefit from a similar mechanism?
(d) Can you think of any disadvantages to using check digits?
The first page must include your names and a title. Do not forget to list
both partner’s names, and turn in only one submission.
Hint: capturing input and output
This project requires that you print out the input/output of three runs of
your program.
Please take a screen capture with the Print Screen button on the
keyboard. That copies an image of the screen to the clipboard. Then, you
should be able to Paste (CTRL-V) the image into a word processor such as
Microsoft Word or LibreOffice Write.
Hint: creating PDF files
You are required to submit your project report as a single PDF file. One way of
doing this is to prepare the entire report in a word processor, such as Microsoft
Word or LibreOffice Write. Both can produce PDF files seam- lessly. LibreOffice
is a free office suite that may be downloaded from http:
//www.libreoffice.org/. Another option is to produce your report on paper, then
scan the whole thing in. There are other options as well.
Due date
Due Thursday 10/09
Late submissions will not be accepted.
ONLY ONE SUBMISSION PER GROUP (Include both names)
