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Personal GPA Calculator Due date: 13 Sep 2018 Weight: 12% Type: All necessary details have been supplied.

Personal GPA Calculator

Due date: 13 Sep 2018

Weight: 12%

Type: Individual

Goals and Topics

The assignment problem is straightforward. All necessary details have been supplied. The solution

of the problem will use the programming concepts and strategies covered in Workshops 1-7. The

subgoals are:

Obtaining advanced understanding of values, variables and arrays;

Understanding program input and output, functions and expressions;

Understanding simple strategies like iteration, validation, sum, count, minimum, and maxi-

mum plans;

Translating simple design into JavaScript code

The mechanics of editing, interpreting, building, running and testing a program

Commenting source code

Becoming condent and comfortable with programming in small problems


Grading in education is the process of applying standardised measurements of varying levels of

achievement in a course. Another way GPA (Grade Point Average) can be determined is through

extra curricular activities. Grades can be assigned as letters (generally A through F), as a range

(for example 1 to 6), as a percentage of a total number of questions answered correctly, or as a

number out of a possible total (for example out of 20 or 100).

In some countries, grades from all current classes are averaged to create a grade point average

(GPA) for the marking period. The GPA is calculated by taking the number of grade points a

student earned in a given period of time of middle school through high school. GPAs are also

calculated for undergraduate and graduate students in most universities. The GPA can be used

by potential employers or educational institutions to assess and compare applicants. A cumulative

grade point average is a calculation of the average of all of a student's grades for all of his or her

complete education career.


In USQ, a Grade Point Average (GPA) is dened as the average of all your nal grades for courses

within a program, weighted by the unit value of each of those courses.". The numerical value

assigned to each nal grade to calculate your GPA for a program are shown as the following:

Numerical value 7 6 5 4 3 1.5

Semester 2, 2007 onwards HD A B C D F

Note that for the purposes of calculating GPA's, all Failing grades, such as F - Fail, FNP - Fail (Did

not participate), FNS - Fail (Did not sit), FNC - Fail (Did not complete) and FLW - Fail (Late

withdrawal), have a numerical value of 1.5. Also, courses for which exemptions have been granted

are not included in the calculation of a GPA, but courses transferred for credit are included.

Mathematically, the GPA is calculated as:



(UnitPvalue  Grade value)

Unit value




is summed over the relevant courses", and the calculation results in a number (GPA)

between 0 and 7.

In this assignment, we assume all courses have the equal Unit value as 1.

Source from:

Wikipedia. Grading (education), accessed on 12 Feb 2017.

University of Southern Queensland. Your grade point average (GPA), accessed on 12 Feb


University of Southern Queensland. Grade Point Average (GPA) Calculation for Medals and

for With Distinction Procedure, accessed on 12 Feb 2017.

University of Southern Queensland. Results legend and glossary, accessed on 12 Feb 2017.

Your Task

USQ is a university with a considerable number and proportion of international students. Some of

the international students are not familiar with the grading system in USQ and sometimes confused

with how their Grade Point Average (GPA) is calculated. Aiming at helping these students, the

USQ Student Guild decided to develop a program as students' personal GPA calculator. In this

assignment, you'll give the USQ Student Guild a hand by designing and implementing the personal

GPA calculator program that allows students to input the completed courses and awarded grades

and then calculate the GPA accordingly.

Functional Requirements

The program should be implemented in JavaScript and running on Firefox, a web browser inde-

pendent to operating systems. The USQ Student Guild has specied the following requirements

for the functionality of the program:


1. The program should be running without errors throughout two Phases: Information Gather-

ing and Information Presenting.

2. Information Gathering is to gather the information such as course codes and awarded grades,

for calculation of GPA;

3. The program should rst conrm with the student (user) for willingness of entering a new

course before proceeding to gather information of the course code and grade value for calcu-


4. When receiving a new entry for a course, the program should rst prompt and ask the user

to enter the course code. If the user enters nothing or an invalid course code, the program

should alert an error message on screen and then prompt the user to re-enter. The process

should iterate until a valid course code is entered.

5. If the entered course code is valid, the program should then prompt the user to input the

grade value for the course. Again, if nothing or an invalid value is entered, the program

should display an error message then iterate until receive a valid grade value.

6. After valid input of course code and grade value, the program should loop back to seek user

conrmation for either proceeding to add one more course or moving to the Information

Presenting phase to calculate and display the results;

7. If the user conrms no more courses to enter, the Information Gathering phase is completed

and the program then moves to Information Presenting.

8. In the Information Presenting phase, the program prints on the web page a table containing

all entered courses, including information such as course code and awarded grade value.

9. To make the GPA calculator user-friendly, the USQ Student Guild also expects the program

to display some statistic information:

- The number of courses that the user has completed and entered;

- The course(s) with the highest grade value;

- The course(s) with the lowest grade value;

- The Grade Point Average (GPA).

Respectively, Figure 1 and 2 illustrate the dataow in Information Gathering and a sample result

presented to the web browser in Information Presenting.


Task 1 - A Validation Plan for Course Codes

You need to implement a validation plan to get a valid input from the user for course code. A valid

course code needs to satisfy ALL the following criteria:

The length of course code is seven;

The rst three characters are alphabetic letters in uppercases;

The last four characters are numbers in range of 1000 { 9999;

No space nor symbols should be included in the course code.

You can refer to the "Timetable Finder" page (https://www.usq.edu.au/timetables/Sem22018twmba/) on

USQ website for sample course codes in practice.


Figure 1: Dataow in Information Gathering


Figure 2: Sample Output of the Program

Task 2 - A Validation Plan for Grade Values

You need to implement another validation plan to get a valid input from the user for grade value.

A valid grade value needs to satisfy ALL the following criteria:

it is a number;

it is an integer value between 3 and 7, or 1.5, a oating point value.

Task 3 - An Iteration Plan for Information Gathering Phase

You need to design an iteration plan to implement the Information Gathering Phase. Refer to

Functional Requirements and Fig. 1 for the detail of data ow in iteration. Clearly, this task

should incorporate the works in Task 1 and 2.

Task 4 - A Maximum Plan to Find the Course with the Highest Grade

Your program needs to nd the course completed with the highest academic grade. If you have

multiple courses with the same highest academic grade, you need to nd and list only one (anyone)

of them for Course with the highest grade".

Optional Challenge with no extra marks gained: If you have multiple courses with the same

highest academic grade, list them all together for Course with the highest grade".


Task 5 - A Minimum Plan to Find the Course with the Lowest Grade

Your program needs to nd the course completed with the lowest academic grade. If you have

multiple courses with the same lowest academic grade, you need to nd and list only one (anyone)

of them for Course with the lowest grade".

Optional Challenge with no extra marks gained: If you have multiple courses with the same

lowest academic grade, list them all together for Course with the lowest hrade".

Task 6 - Sum, Count, Average Plans to Calculate the Grade Point Average

Your program needs to be able to calculate the grade point average for all entered courses. The task

should be completed following Eq. 1 on Page 2 with a xed parameter Unit value = 1, including

a sum plan following


(Unit value  Grade value) to accumulate the grades of all courses;

a count plan following


Unit value to count the number of courses being entered;

an average plan to calculate the grade point average;

handling the Division by Zero" exception when calculating average.

Task 7 - Presenting the Detailed Course Information

Print to a table the detailed information of entered courses including the course codes and grade


Task 8 - Presenting the Statistics

Print to an unordered list the statistic information of

how many courses having been entered;

the course with the highest grade value;

the course with the lowest grade value;

the Grade Point Average (GPA) with the precision of only one digit after decimal point

(round up if the second digit is equal to or above 0.05).

The table and the list should be formatted like the screenshot in Figure 2.

Task 9 - Duplicate Course Detection (optional challenge with no extra marks


The USQ Student Guild will appreciate it if an extra feature can be delivered { to detect duplicate

course entries. If a course code has already been entered, the system should detect it and then ask

for user conrmation for updating the corresponding grade value or not. If the user gives a positive

conrmation, the system will proceed to prompt for grade value and then replace the stored grade by

the newly entered value; otherwise, the program terminates the current course-adding process and

iterates to ask user conrmation for adding a new course or not. Note that the user is not allowed

to remove a course after entered.


Program Integration Test

You need to test the program for all functionality thoroughly before delivering the program to USQ

Student Guild. The program should be running appropriately without any syntax or logic errors.

Non-Functional Requirements

All code should appear in the script section in the head of the HTML document. Do not

write any code in the HTML body. All functionality are delivered by JavaScript.

In the script arrange your code as in the following order:

(a) Constants;

(b) Variables and objects (declared and initialised);

(c) Other statements.

Variable and constant identiers should follow appropriate conventions.

Code is indented appropriately and grouped in blocks according to the common tasks at-

tempting to.

Appropriate comments should be added to all blocks of code. Do not simply translate the

syntax into English for comments, instead, describe the purpose of the code.


WhatYou Need to Submit { Two Files

For a complete submission you need to submit two les as specied below. You can submit them

individually or compress them and submit a common .zip (or .rar) le. The assignment submission

system will accept only the les with extensions specied in this section.

1. Statement of Completeness in a le saved in .doc format with 200{300 of your own words


- The state of your assignment, such as, any known functionality that has not been

implemented and delivered, etc. (It is expected that most people will implement all of

the functionality required by this assignment.)

- Problem encountered, such as, any technical problems that you encountered during

the assignment work and how you dealt with them;

- Reection, such as, any lessons learnt in doing the assignment and suggestions to future

programming study or work.

2. The program in a le saved with an .html extension contains the source code implemented

following the functional and non-functional requirements.


Late Submission and Extension Request

Please refer to USQ Policy Library - Assessment Procedure for information on the late submission

policy and USQ Policy Library - Assessment of Compassionate and Compelling Circumstances

Procedure for considerable special circumstances in extension request.

The Extension Request Form is available on the course's StudyDesk. Should you need to request

an extension please ll the form and email it to the Course Examiner with supportive documents

(e.g., medical certicate or endorsement letter from supervisor in workplace) prior to the due date .

Please note that any requests without supportive documents will be rejected directly.

Suggested Strategy

Plan to complete the assignment on time. Do not write all of the code in one sitting and expect

that everything will be working smoothly like a magic.

First step Read assignment specication carefully; clarify anything unclear by putting a post on

the assignment forum; think about how to do it, how to test it, devise high-level algorithms

for each independent part of the assignment. Begin to write program (with comments), in

incremental stages. Seek help on the assignment forum if needed.

Second step Re-read the specication carefully. Try to implement the function in one task a time,

test it and make sure it works as expected before move to next task. Bring up any problems

to the assignment forum if necessary. Integrate all functions and nish initial coding..

Third step Fully test the program; have another review on the source code; re-read the speci-

cation (especially marking criteria) to make sure you have done exactly what is required.

Complete the Statement of Completeness".


Marking Criteria

The assignment will be marked out of 24 and scaled down to a grade out of 12. Table 1 presents

the marking criteria. If all criteria are satised you will receive 24 marks. If not all criteria are met,

part marks may be given. Check your own submission against these criteria before you submit it.

Table 1: Marking Criteria


Statement of Completeness

1 The statement is in appropriate length of 200-300 of student's own words 1

2 The State of assignment" reects the true state of completeness 1

3 The Problems encountered" discusses problems, diculties and their dealing strategies 1

4 The Reection" discusses learnt lessons and reasonable suggestions 1

Subtotal 4

Functional Requirements

5 The program is running without any errors 1

6 Task 1 (a) - User input for course code is obtained appropriately 1

7 Task 1 (b) - The validation plan validates course code input as required 1

8 Task 2 (a) - User input for grade value is obtained and parsed to appropriate type if necessary 1

9 Task 2 (b) - The validation plan validates grade value input as required 1

10 Task 3 (a) - Information Gathering Phase in iteration takes multiple courses 1

11 Task 3 (b) - User conrmation is obtained using correct function and used as the sentinel 1

for iteration plan

12 Task 4 - The maximum plan nds the course with the highest grade value 1

13 Task 5 - The minimum plan nds the course with the lowest grade value 1

14 Task 6 (a) - The count plan calculates the number of entered courses correctly 1

15 Task 6 (b) - The sum plan calculates the total grade values correctly 1

16 Task 6 (c) - The average plan calculate the GPA correctly 1

17 Task 6 (d) - The GPA is displayed at right precision level 1

18 Task 6 (e) - Division by Zero" exception is handled appropriately 1

19 Task 7 - The entered courses and corresponding grade values are presented correctly in table form 1

20 Task 8 - The statistics are presented completely in an unordered list 1

Subtotal 16

Non-functional Requirements

21 The program is implemented in JavaScript. No code goes outside of the script section 1

22 Identiers of variables and constants are following professional conventions 1

23 Constants and variables are used in calculation and expression instead of explicit values 1

24 At least ve comments are added to describe the purpose of blocks of code 1

Subtotal 4


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