DEVRY COMP 220 iLab 2 Resistor Lab Report and Source Code

DEVRY COMP 220 iLab 2 Resistor Lab Report
and Source Code
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Scenario and Summary
This lab requires you to create a multifile C++ project in order to design and
implement an object-oriented program using a class to model the characteristics and
function of a resistor.
Deliverables
Submit a single Notepad file containing the source code for Exercise 1 to the Dropbox
for Week 2. Your source code should use proper indentation and be error free. Be
sure that your last name and the lab number are part of the file name; see the
following example: YourLastName_Lab1.txt.
Each program should include a comment section that includes (at a minimum) your
name, the lab and exercise number, and a description of what the program
accomplishes. Submit a lab report (a Word document) containing the following
information to the Dropbox for Week 2. Include your name and the exercise number.
Specification: Include a brief description of what the program accomplishes,
including its input, key processes, and output. Test Plan: Include a brief description

of the method you used to confirm that your program worked properly. If necessary,
include a clearly labeled table with test cases, predicted results, and actual results.
Summary and Conclusions: Include a summary of what the lab demonstrated and any
conclusions drawn from the testing of the lab program. Answers to Lab Questions:
Answer any and all lab questions included in the lab steps.
Summary: Write a statement summarizing your predicted and actual output. Identify
and explain any differences.
Conclusions: Write at least one nontrivial paragraph that explains, in detail, either a
significant problem you had and how you solved it or, if you had no significant
problems, something you learned by doing the exercise.
Each lab exercise should have a separate section in the lab-report document.
Your lab grade will be based upon
the formatting of your source code; the use of meaningful identifiers; the extent of
internal documentation; the degree to which an exercises’ specifications are met;
and the completeness of your lab report.
i L A B S T E P S
STEP 1: Create a Multifile Project
Objective: Create a C++ console application that will model the characteristics of a
resistor.
Create a multifile project. Create and add to the project an h file containing the
resistor-class definition. Create and add to the project a cpp file containing the
implementation of the class-member functions. Create and add to the project a ccp
file containing the main() function, which will instantiate a resistor object and test
its member functions.
STEP 2: Required Class Members
The resistor class will, at minimum, have members that do the following.
store the nominal resistance value of a resistor store the tolerance of a resistor
initialize any and all nominal-resistance values to correct, EIA, nonzero values that
are greater than 0 and less than 1,000,000 ohms initialize any and all resistancetolerance
values to correct, E12, E24, E48, or E96 resistance-tolerance values allow
the nominal-resistance and tolerance values of a resistor object to be changed by the
user All member functions should have a test message stating the name of the
function. All the test messages should be displayed or not displayed, depending on
the value of a Boolean variable declared in main(). If the Boolean , display the
message. If the Boolean , do not display the message.

STEP 3: Program Operations
Function main() should instatiate two objects of class resistor. Function main()
should display the current values of all resistor objects. Function main() should also
calculate and display the minimum and maximum in-tolerance resistance values of
each resistor object from the resistor data members. Function main() should allow
the user to change the values of the nominal resistance and the resistor tolerance of
both resistor objects, and it should also correctly handle out of numeric-range input.
Main() is also responsible for making sure that the user can successfully enter only
correct, EIA resistance and tolerance values. The user should be given the following
data-entry choices: accept current EIA values for resistance and tolerance; The
function main() should display the new, modified values of the resistor object,
including the new min and max in-tolerance resistance values. The function main()
should be executed twice: once with the test messages displayed and once without.
STEP 4: Lab Questions
You are not required to copy the question text into your document, but all answers
should be listed with the question number they answer.
List the complete reference-source information for where you found the EIA
standard resistor value and tolerance information. How was this reference
discovered and where? The constructor requires the initialization values for the
nominal resistance and the tolerance when an object is instantiated to be a correct E-
series resistance and tolerance combination. Describe how this was accomplished in
your program design and implementation. In the lab, you were required to provide
mutator functions to change the nominal-resistance and tolerance values of a
resistor object. Describe how this was accomplished so that the user could not enter
an invalid nominal-resistance and E-series tolerance combination. Describe how this
process was different and/or similar to how you implemented this validation in the
class constructor.