Your next task is to implement
the software that you designed
in previous steps. You need
Programming Languages
Can-Tho University
22 pag.
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ASSIGNMENT 2 FRONT SHEET
Qualification
BTEC Level 5 HND Diploma in Computing
Unit number and title
PROG102: Procedural Programming
Submission date
November 13
Date Received 1st submission
Re-submission Date
Date Received 2nd submission
Student Name
Huynh Chi Bao
Student ID
GCC200363
Class
GCC0904
Assessor name
Le Huynh Quoc Bao
Student declaration
I certify that the assignment submission is entirely my own work and I fully understand the consequences of plagiarism. I understand that
making a false declaration is a form of malpractice.
Student’s signature
Huynh Chi Bao
Grading grid
P4
P5
M3
M4
D2
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 Summative Feedback:
Grade:
 Resubmission Feedback:
Assessor Signature:
Date:
Lecturer Signature:
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Table of Contents
Screenshots & Explain........................................................................................................................................ 5
I.
1.
Problem ............................................................................................................................................................ 5
2.
Problem solving ............................................................................................................................................... 5
II.
1.
Coding standard.............................................................................................................................................. 5
2.
Library in the program .................................................................................................................................. 6
3.
Variables in the program ............................................................................................................................... 6
4.
Do – while loop to enter the number of students.......................................................................................... 6
5.
Function input information of student’s: ..................................................................................................... 7
6.
Function output information of student ....................................................................................................... 8
7.
Function find highest and lowest grades of student. .................................................................................... 8
8.
Menu options. ................................................................................................................................................ 10
III.
Testing (P4).................................................................................................................................................... 12
1.
Screenshot ...................................................................................................................................................... 12
2.
Test plan (P5) ................................................................................................................................................ 15
IV.
V.
Implements (P4, M3) ...................................................................................................................................... 5
Analyze (M4) ................................................................................................................................................. 19
Evaluation (D2) ................................................................................................................................................. 22
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Figure 1.Local variable using camels -cased letters ...................................................................................................... 5
Figure 2.Constant name using uppercase letters ......................................................................................................... 5
Figure 3.Library of the program .................................................................................................................................... 6
Figure 4.Global variables of program. .......................................................................................................................... 6
Figure 6.Loop to enter number students...................................................................................................................... 6
Figure 5.Input information of student. ......................................................................................................................... 7
Figure 7.Print information of student to the screen. ................................................................................................... 8
Figure 8.View student has highest grade...................................................................................................................... 8
Figure 9. View student lowest grade. ........................................................................................................................... 9
Figure 10. Menu options of program (1) .................................................................................................................... 10
Figure 11. Menu options of the program (2) .............................................................................................................. 11
Figure 12.Menu option. .............................................................................................................................................. 12
Figure 13.Input ID and Grade of student .................................................................................................................... 12
Figure 14.Output information of students. ................................................................................................................ 13
Figure 15.Find highest grade of students. .................................................................................................................. 13
Figure 16.Find lowest grade of students. ................................................................................................................... 14
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I.
Screenshots & Explain
1. Problem
A math teacher wants to manage grades of a class. He asks you to help him to write
a small application to do that. He needs to enter student IDs, student’s grades and
store this information into 2 separate arrays (integer array for IDs and float array
for grades). Then he needs to print all student IDs together with their grades. Finally,
he needs to know which student has highest grade and lowest grade. Your program
should be menu based with the options above. When an option is done, the program
should go back to the main menu so he can choose another option. There should be
an option to quit program.
2. Problem solving
I write a program to used manage student information. The main function of program is:
II.
-
Input student information. (Student ID, student grade)
-
Output student information. (Print to the screen)
-
Find the student has highest grade.
-
Find the student has lowest grade.
-
Exit.
Implements (P4, M3)
1. Coding standard
-
Local variables must be named using camel – cased letters that star with lowercase letters
(e. g. grade).
Figure 1.Local variable using camels -cased letters
-
Constant names must be formed using only uppercase letters (e.g. ID).
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Figure 2.Constant name using uppercase letters
-
The name of the function clearly and concisely explains why using the function.
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-
Indentation:
+ A space is required after entering a comma between the arguments of both functions.
+ Each nested block should be properly indented and spaced.
+ Proper indentation should be at the beginning and end of each block in the program.
2. Library in the program
In this program, I use <stdio.h> library because it provides the core of the input function.
This library contains the print function to display the input data to the screen.
Figure 3.Library of the program
3. Variables in the program
-
I use local variables to declare variables used in the program:
+ Integer: ID (ID of students)
+ n (Number of students), i, j.
+ Float: grade (Grade of students)
Figure 4.Global variables of program.
4. Do – while loop to enter the number of students
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Figure 5.Loop to enter number students
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-
The main objective of this loop is the number of input students
-
If the student enters incorrectly, the program will send a message on the screen asking
the teacher to re-enter the student number ("Incorrect! Please re-enter:").
5. Function input information of student’s:
-
Help you check if you have entered the recently entered ID, use the for loop to check in
the array ID.
-
Input student’s ID and check for duplicates. If it is duplicated, the user will have to reenter it.
-
Input student’s grade and check if grade is valid or not. If it not, the user need to input
again.
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Figure 6.Input information of student.
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6. Function output information of student
Help you print student information to the screen.
Figure 7.Print information of student to the screen.
7. Function find highest and lowest grades of student.
 Help you find the student has highest grade and print to screen.
-
Max = Grade [0], max ID =IDs [0].
-
i from 0 to (n-1) (n is the number of student).
-
If max < grade[i] then max = grade[i], max ID= IDs[i]
-
Print the result on the screen.
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Figure 8.View student has highest grade.
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 Help you find the student has lowest grade and print to screen.
-
Min = Grade [0], min ID =IDs [0].
-
i from 0 to (n-1) ( n is the number of students)
-
If grade[i] < min then min = grade[i], min ID= IDs[i]
-
Print the result on the screen.
Figure 9. View student lowest grade.
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8. Menu options.
Help to output more options in the menu.
- Input student ID and grade.
- View student ID and grade.
- Find the highest of student.
- Find the lowest of student.
- Exit program.
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Figure 10. Menu options of program (1)
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Figure 11. Menu options of the program (2)
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III. Testing (P4)
1. Screenshot

Menu option:
Figure 12.Menu option.
 Input student information:
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Figure 13.Input ID and Grade of student
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 Output information of students to the screen:
Figure 14.Output information of students.
 Find the highest grade of students:
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Figure 15.Find highest grade of students.
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 Find the lowest grade of students:
Figure 16.Find lowest grade of students.
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2. Test plan (P5)
No.
-
Creator: Huynh Chi Bao
-
Create date: November 13, 2021
Test case
Function
Input Data
Expected
Actual output
Result
output
1. Verify
that Input
- Enter number Student
Student
student ID
information
and grade
will
of students: 3
1
- Student
user enters
valid
informatio
Pass
information
- Student ID 1: n save into save into array:
save
into array if
Student
grade: 7
array:
ID[]={1,2,3}
ID[]={1,2, Grade[]={7,8.
3}
5,9}
- Student ID 2: Grade[]={
information
2
7,8.5,9}
- Student
grade: 8.5
- Student ID 3:
3
- Student
grade: 9
2. Verify that
Enter
Display
Display
duplicate.
error
message “ID is
IDs” are
message
duplicate”
displayed if
“ID
the user
duplicate”
“Duplicate
-
error Pass
is
enters a
duplicate ID
number.
3. Verify
that
“Number of
student
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- Enter number Display
of students: -5 error
message
Display
error Pass
message
“Number
of
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must
“Number
be
student
positive
of student be
number” is
must
displayed if
positive
user enters
number”
number
must
positive
be number”
of
student
with
negative
number.
4. Verify
that
- Enter number Display
“Student’s
grade
from
of students: 3
is
0
Display
error
message
“Student’s
- Student ID 1: message
to
1
10. Please,
- Student
enter again”
grade: 15
“Student’s
grade
grade is from 0
is to 10. Please,
from 0 to enter again”
is displayed
10. Please,
if
enter
user
error Pass
again”
enters
invalid
student’s
grade .
5. Verify
that Display
ID[]={1,2,3}
List
of List of student Pass
“Student
student ID Grade[]={7,8.5,
student ID ID and grade:
information
and grade
and grade:
will
- Student
displayed
when
9}
user
choose
ID 1: 1
- Student
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grade: 7
menu “Print
- Student
Student ID
ID 2: 2
- Student
ID
1: 1
- Student
grade: 7
- Student
ID
2: 2
and grade”.
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- Student
- Student
grade:
8.5
grade: 8.5
- Student
- Student
ID 3: 3
ID
3: 3
- Student
- Student
grade: 9
grade: 9
6. Verify
that Find
ID[]={1,2,3}
Student
Student
Grade[]={7,8.5,
has
highest grade:
9}
highest
-
“IDs” will be
grade:
grade:10
displayed
-
-
“Lowest
student’s
grade” and min grade
when
the
Highest
has Pass
Highest
ID
grade:
user
10
chooses the
-
ID:3
menu “Find
who
has
student
lowest
grade.
7. Verify
that Find
ID[]={1,2,3}
Student
Grade[]={7,8.5,
has lowest lowest grade:
9}
grade:
-
-
Lowest
grade:7
displayed
grade:
-
when
7
“Highest
student’s
grade” and max grade
“IDs” will be
the
user
-
Student
has Pass
Lowest
ID:1
ID:1
chooses the
menu “Find
who
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has
student
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highest
grade
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IV. Analyze (M4)
No.
1.
Test case
Function
Verify that
Input student
Student
ID and grade
Result
Pass
Evaluation
The program
has performed
information will
effectively and
save into array
saved the data
if user enter
in the array
valid
information
2.
3.
Verify
that
Pass
The
program
“Duplicate IDs”
has performed
are displayed if
effectively and
the user enters
require
user
a duplicate ID
value
valid
number.
again
Verify
that
“Number
student
be
Pass
The
of
has performed
must
effectively and
positive
require
user
valid
number”
is
value
displayed
if
again
user
program
enters
number
of
student
with
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negative
number
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4.
Verify
that
Pass
The
program
“Student’s
has performed
grade is from 0
effectively and
to 10. Please,
require
user
enter again” is
value
valid
displayed
again
user
if
enters
invalid
student’s grade
.
5
Verify
that Display student Pass
“Student
ID and grade
The
program
has performed
information will
effectively and
displayed when
printed
user
Student ID and
choose
menu
“Print
Grade
from
Student ID and
the array were
grade”.
saved
to
display
6
that Find
Verify
student’s Pass
The
program
“Lowest grade” min grade
has performed
and “IDs” will
effectively and
be
found
displayed
when the user
chooses
lowest grade
the
menu “Find who
has
the
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student
lowest grade.
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7
that Find
Verify
student’s Pass
The
program
“Highest grade” max grade
has performed
and “IDs” will
effectively and
be
found
displayed
when the user
chooses
the
highest grade
the
menu “Find who
has
student
highest grade
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V.
Evaluation (D2)
 After testing and checking this program, I realized that:

-
Advantages:
It can store student’s ID and grade. It can check whether the entered ID is the same or the
entered grade is valid. If the ID duplicates or the grade is invalid, the teacher will be
prompted to re-enter.
-
If all the data entered by the teacher is valid, the program will print the student information
on the screen to find the student with the lowest and highest grade.
-
The program has the option to exit and exit the program when the teacher completes the
program’s session.

-
Disadvantages:
If the teacher enters the wrong data type required for the command, the program will receive
an error. In the test log table above, when the teacher enters a letter as a student’s ID, the
program fails and an infinity loop occurs even if the command requires a number.
-
It is more difficult for teachers to know who a student is by simply entering the student ID.
-
If the teacher enters the wrong student’s data and wants to re-enter it, the only way is to reenter the data from the beginning and there is no re-entry option for a particular student.
-
In some cases, when the teacher enters the invalid data type required by the command, but
the program continues to run and displays the data on the screen, error data is displayed.
 Conclusion: Although the program has many errors, it can still be seen as a complete student
management program that basically meets the needs of teachers. In the future, I will try to
improve my ability to fix existing bugs, optimize and complete this program.
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