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C++ Programming
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design and write good structured and object-oriented C++ programs; design and write well documented C++ programs that use programmer designed data structures.

INSTRUCTIONS TO CANDIDATES
ANSWER ALL QUESTIONS

Objectives:

  1. design and write good structured and object-oriented C++ programs;
  2. design and write well documented C++ programs that use programmer designed data structures;
  1. design and execute test plans (unit tests and application tests);
  2. draw Unified Modeling Language class diagrams that can be implemented;
  3. discuss (and apply) the theory and application of data structures and the algorithms that use them and are used by them;
  1. design and implement solutions that adhere to given specifications and requirements.

Assignment Question:

Please read the following very carefully to identify the requirements of the assignment. You

should make separate notes.

Design an object-oriented solution and implement the solution in C++ to solve the problem

described below.

The data files that you need for this assignment are made available to you in the data folder.

This data comes from historical data recorded by sensors and was obtained from

http://wwwmet.murdoch.edu.au/. Data is logged at intervals of 10 minutes. Sample data in

comma-separated value text files is made available for this assignment. Each file contains a

year’s worth of data for multiple sensors. Data for each date-time recording are on separate

rows. Within each row, a comma separates the value for each sensor. The sensor codes are

found at http://wwwmet.murdoch.edu.au/sensors. Examine the data using a text editor like

notepad++ and in a spreadsheet application. If you download your own data, you may want to

remove the first few rows if the key list (sensor list) is there. The data that is supplied to you

with this assignment does not contain the key list, and there is no need to download your data

unless you specifically want to.

Note: Don’t tick “Date/Time in UTC” when downloading the data yourself. When

downloading your own data, you may find that the data column arrangement may not be the

same if the backend code at the website has changed.

To understand the nature of the data, you must complete the lab for topic 5. You need to

understand the nature of the data files and how to read the data and load the data into the

required data structures. You will need the code that you developed in lab 5 to continue work

on this assignment.

Design and then write an Object Oriented program in C++ that meets the specifications shown

below. You should provide a suitable menu with an exit option in your main program. When

designing the output, imagine yourself as the user of the program. You want the user

interaction to be concise but user friendly on the command line. Do not use GUI interaction.

Sample output formats shown below use made up data for the year 1905.

Menu options are:

  1. The average wind speed and average ambient air temperature for a specified month and

year. (print on screen only)

Example output format if there is data:

January 1905: 5.5 km/h, 25.5 degrees C

Example output format if there is no data:

March 1905: No Data

  1. Average wind speed and average ambient air temperature for each month of a specified

year. (print on screen only)

Example output format is:

1905

January: 5.5 km/h, 25.5 degrees C

February: 4.5 km/h, 27.5 degrees C

March: No Data

  1. Total solar radiation in kWh/m2 for each month of a specified year. (print on screen

only)

Example output format is:

1905

January: 196.4 kWh/m2

February: 200.3 kWh/m2

March: No Data

  1. Average wind speed (km/h), average ambient air temperature and total solar radiation in

kWh/m2 for each month of a specified year. (write to a file called “WindTempSolar.csv”)

Output Format:

Year

Month,Average Wind Speed, Average Ambient Temperature, Solar Radiation

Example output format is:

1905

January,5.5,25.5,196.4

February,4.5,27.5,200.3

Year is printed on the first line and the subsequent lines list the month and the average

wind speed, average ambient air temperature and the total solar radiation for each

month. The values are comma separated.

For menu item 4: If data is not available for any month, do not output the month. In the

example, March 1905 has no data. Nothing is output for March. If the entire year’s data

is not available, output just the year on the first line and the message “No Data” on the

second line.

  1. Exit the program.

The user specifies the year and/or month. Your program asks for these on the command line

and the user types in the required values and presses the “Enter” key. Date and month entries

on the command line must be numeric. For example, the user types in the value 1 and not the

string January or Jan to represent the first month of the year.

Although there a number of data columns in the data file, you will only use columns with

labels WAST (date and time), S (Wind Speed), SR (Solar Radiation) and T (Ambient air

temperature).

Convert units carefully as the output units are not all the same as the units in the data files. For

example input column S is in m/s but the output needed is km/h. The units for solar radiation

in the input data file and the output are also not the same.

Processing:

Your program loads the data first from the data folder.

The program for assignment 1 will read only one input data file from the data folder. Do not

read data files from anywhere else other than this folder.

After loading the data into the required data structures (see below), your program displays the

menu to the user. The required data structures (see below) must be used for menu items 1 to 4.

Make sure the design is modular to cater for future iterations of the assignment requirements.

For example, future iterations might require handling of more data fields, use of different data

structures. New output requirements may be needed.

If you do not attempt to "future-proof" your design (modularise, increase cohesion, reduce

coupling), you will find that you will be re-doing all (or most of) the work to cater for new or

modified Assignment 2 requirements within a very much-restricted time frame (can be less

than 2 weeks).

Heed the advice and lessons learned in Labs 1 to 5. Complete all readings and lab work from

topics 1 to 5 before starting to work on this assignment. You can, of course, write small

programs to test out ideas needed for this assignment: like how to read and extract data from

the given data files (lab for topic 5); test out algorithms for doing the required processing and

unit test basic classes like the Date, Time and Vector classes from lab 5 for use in this

assignment.

Completion of Lab 5 is important for this assignment as a number of needed classes are

created and unit tested in Lab 5 and in previous labs.

Data Structures:

Reuse the Date, Time and template Vector classes from the laboratory exercises. A template

vector class, called Vector must be used and you must write your own minimal and complete

template Vector class to store data in a linear structure (from Lab 5). For the purposes of the

assignment, a Vector class is a dynamic array encapsulated in a class called Vector. Access to

the private array is through the Vector’s public methods. This Vector is not the same as the

STL vector. The Vector for the assignment provides the same functionality as an array with

controlled access. The Vector also contains only a few methods that are absolutely essential

for the Vector. Nice to have functionality should not be implemented as methods. Such nice to

have functionality can be provided by helper routines that are not methods (and not friends).

As an example, in lab 4 you had the I/O operators that were routines that provided I/O

convenience to the classes. Helper routines can also be functions and procedures that operate

on the Vector class.

The Vector should allow for resizing. If more space is needed in the Vector than what is

available, the Vector would increase its size. As required in lab 5, the client of Vector should

not need to make this request to increase size.

To better understand the template requirement, you should complete the textbook chapter on

“Overloading and Templates” and complete Lab 5.

Make sure you know the difference between a template class and STL class.

Make sure that the implementation of a method is separate from the method’s prototype

declaration (interface) in a class. This ensures that the implementation and the interface are

separate. For template classes both interface and implementation will be in the same .h

(header) file but in separate parts of the file. For non-template classes, the interface will be in

.h files and the implementation will be in .cpp files.

In all cases, method interfaces (declarations) should have separate implementations outside the

class declaration. The declarations will not have method code body. The code body will be

outside the class declaration. If you need to revise this idea, go through the readings for topic

1.

Header files (.h) must be documented using doxygen style comments as shown in the file

ModelFile.h in doxyexample folder from earlier topics. See DoxyExample from Topic 1. For

convenience, a copy of ModelFile.h is provided with this assignment. Comments should be

indented to the right so that method prototypes stand out from the comments. Follow the style

in ModelFile.h.

As indicated earlier, you should design your classes so that they can be used in the future with

different specifications of this assignment. See the Lab 5 exercise where you are asked to

“future-proof” your design.

You should be careful that you do not have data structure classes that have I/O methods or

friends. Completion of laboratory session 4 is also essential. If you have data structure classes

that do I/O, aside from losing marks, you will have to do a lot more re-coding (i.e. a lot more

work) when the I/O requirements change. You may want to have dedicated I/O classes instead

or let the main program deal with I/O. Be mindful of the principles of cohesion and coupling

as these concepts underlie some of the SOLID principles

(https://en.wikipedia.org/wiki/SOLID) and GRASP

https://en.wikipedia.org/wiki/GRASP_(object-oriented_design) or more detailed in this PDF

file link (if interested).

STL data structures/algorithms cannot be used in this assignment.

You may use std::string and string stream classes in your program instead of using C like

strings. You may use iostream and file handling classes and objects in C++. See laboratory

exercises.

Any advice and further clarifications to these requirements would be found in the QandA file

in the assignment 1 area. Questions and Answers (if any) would also be found in this file.

Notes:

  1. The five program menu items listed above are part of assignment 1 requirements. There

can be other requirements that you do not need to implement in this assignment but your

design and implementation should be such that additional requirements could be added

without major re-design and re-write of the code. As background information (not

relevant to this assignment), research papers (see

https://www.sciencedirect.com/science/article/pii/S1876610213000829,

https://www.sciencedirect.com/science/article/pii/S0960148108001353) suggest that

solar panel (PV) performance can be affected by temperature.

  1. Solar radiation data is recorded in the text data file as W/m2 (Watts per square meter).

This is the amount of solar energy being measured per second over an area of one

square meter. Or, in other words, the amount of power that is being detected over an

area of one square meter. The actual meaning of the value is found here

http://wwwmet.murdoch.edu.au/details. As the value recorded is the average W/m2

over a 10-minute period, you need to convert this to kWh/m2

. This is done by

converting the power in Watts (W) over a 10-minute period to Watts-hours. 10 minutes

is 1/6 hour. So if the power is 120W for 10 minutes, this would equate to 120W x 1/6

hour = 20Wh. To convert Wh to kWh, divide this value by 1000. Thus you have 0.02

kWh. So 120W/m2 for 10 minutes is 0.02 kWh/m2

. You may want to view

http://en.wikipedia.org/wiki/Kilowatt_hour for a further discussion if you are interested.

Manually check calculations done by your code. If the output is wrong, your program

would be considered as not working.

We use our own test data files to test your program. You will not have access to our test

data files and so it would not be possible for you to fake results. Our test data files will

have the same format as that provided to you but the data will be different.

Attachments:
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