辅导 DTS102TC Programming with C++ 程序设计
XJTLU Entrepreneur College (Taicang) Cover Sheet
Module code and Title DTS102TC Programming with C++
School Title School of Artificial Intelligence and Advanced Computing
Assignment Title Coursework 1 (Assignment)
Submission Deadline 5 pm China time (UTC+8 Beijing) on Fri. 28th. Nov. 2025
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DTS102TC Programming with C++
Coursework 1 (Assignment)
Deadline: 5:00 pm China time (UTC+8 Beijing) on Friday 28th. Nov. 2025
Percentage in final score: 50%
Maximum score: 100 marks (100% individual marks)
Learning outcomes assessed:
A. Demonstrate knowledge and understanding of basic principles of C++ programming language.
B. Demonstrate knowledge and understanding of basic software development process.
Late policy: 5% of the total marks available for the assessment shall be deducted from the
assessment mark for each working day after the submission date, up to a maximum of five working
days.
Notice:
• Please read the coursework instructions and requirements carefully. Not following these
instructions and requirements may result in loss of marks.
• The assignment must be typed in an MS Word and converted to a PDF document. The
document must be submitted via Learning Mall Online to the Gradescope. Only electronic
submission is accepted and no hard copy submission. All submissions should be written in
English.
• All students must download their file and check that it is viewable after submission.
Documents may become corrupted during the uploading process (e.g. due to slow internet
connections). However, students themselves are responsible for submitting a functional and
correct file for assessments.
• Please download the Source Code Template from Learning Mall Online. Do not change the
file name of each code script.
• Academic Integrity Policy is strictly followed.
Overview
The objective of this assignment is to develop proficiency in C++ programming and software
development skills. You are required to write a C++ program to address each question.
For each question, you must write code to generate the required results and submit it via
Gradescope for evaluation of program implementation. Additionally, for each question in your
report, you will need to prepare a brief report analyzing your methods and discussing the results
in conjunction with your test cases. Code quality—including variable naming conventions and
function comments—will also be assessed.
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Section A. Fundamental of C++ Programming (70marks)
In this section, there are 9 questions. Please use the code template available on the Learning Mall
and submit your code solutions via Gradescope to pass the test cases. Note that you are limited
to 5 submissions per question on Gradescope; exceeding this maximum will result in a loss
of full marks for that question.
Question 1. Algebra: solve quadratic equations (5 marks)
The two roots of a quadratic equation 2 xbxax =++ 0 can be obtained using the following
formula:
a
acbb
r
2
2 4
1
−+− = and
a
r
acbb
2 2 =
2 −−− 4
2 − 4acb is called the discriminant of the quadratic equation. If it is positive, the equation has two
real roots. If it is zero, the equation has one root. If it is negative, the equation has no real roots.
Follow the code template to write a program that has values for a, b, and c and displays the result
based on the discriminant. If the discriminant is positive, display two roots. If the discriminant is
0, display one root. Otherwise, display “The equation has no real roots.”
Note that you can use pow(x, 0.5) to compute √𝒙𝒙 . Here are some sample examples.
Sample Run
Enter a, b, c: 1.0 -3 2
The roots are: 2.0 and 1.0
Enter a, b, c: 1 -2 1
The root is: 1.0
Enter a, b, c: 1 0 1
The equation has no real roots
Question 2. Geometry: area of a regular polygon (5 marks)
A regular polygon is an n-sided polygon in which all sides are of the same length and all angles
have the same degree (i.e., the polygon is both equilateral and equiangular).
The formula for computing the area of a regular polygon is:
where s is the length of a side. Follow the code template to write a program that has the number
of sides and their length of a regular polygon and displays its area.
Sample Run
Enter the number of sides: 5
Enter the length of a side: 6.5
The area of the polygon is 72.69
Question 3. Count positive and negative numbers and compute the average of numbers (5
marks)
Follow the code template to write a program that reads an unspecified number of integers,
determines how many positive and negative values have been read, and computes the total and
average of the input values (not counting zeros). Display the average as a floating-point number.
Sample Run
Enter an integer value, the input ends if it is 0: 1 2 -1 4 0
The number of positives is 3
The number of negatives is 1
The total value is 6
The average value is 1.50
Question 4. Binary to decimal (5 marks)
Follow the code template to write a function that returns a decimal number from a binary string.
For example, binaryString 10001 is 17 (1*2^4+0*2^3+0*2^2+0*2+1=17 ).
So, the function solve_bin_to_dec("10001") returns 17.
Question 5. Print distinct numbers (5 marks)
Follow the code template to write a program that reads in 10 numbers and displays distinct numbers
(i.e., if a number appears multiple times, it is displayed only once). The numbers are displayed in
the order of their input and separated by exactly one space.
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(Hint: Read a number and store it to an array if it is new. If the number is already in the array,
discard it. After the input, the array contains the distinct numbers.)
Sample Run
Enter ten numbers: 1 2 3 2 1 6 3 4 5 2
The number of distinct numbers is 6
The distinct numbers are: 1 2 3 6 4 5
Question 6. Sum elements in each column (10 marks)
Write a function that returns the sum of all the elements in a specified column in a matrix using
the following header:
double sumColumn(const double m[][4], int rowSize, int columnIndex)
Follow the code template to write a program that reads a matrix and displays the sum of each
column.
Sample Run
Enter a 3-by-4 matrix row by row:
1.5 2 3 4
5.5 6 7 8
9.5 1 3 1
Sum of the elements at column 0 is 16.5
Sum of the elements at column 1 is 9
Sum of the elements at column 2 is 13
Sum of the elements at column 3 is 13
Question 7. The Rectangle class (10 marks)
Design a class named Rectangle to represent a rectangle. The class contains:
• Two double data fields named width and height that specify the width and height of the
rectangle.
• A no-arg constructor that creates a rectangle with width 1 and height 1.
• A constructor that creates a rectangle with the specified width and height.
• The accessor and mutator functions for all the data fields.
• A function named getArea() that returns the area of this rectangle.
• A function named getPerimeter() that returns the perimeter.
Implement the class. Write a test program that creates two Rectangle objects. Assign width 4 and
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height 40 to the first object and width 3.5 and height 35.9 to the second. In the report, display the
width, height, area, and perimeters of the first object and then the second object.
Question 8. Geometry: The Rectangle2D class (15 marks)
Define the Rectangle2D class that contains:
• Two double data fields named x and y that specify the center of the rectangle with constant
get functions and set functions. (Assume that the rectangle sides are parallel to x- or y-axes.)
• The double data fields width and height with constant get functions and set functions.
• A no-arg constructor that creates a default rectangle with (0, 0) for (x, y) and 1 for both width
and height.
• A constructor that creates a rectangle with the specified x, y, width, and height.
• A constant function getArea() that returns the area of the rectangle.
• A constant function getPerimeter() that returns the perimeter of the rectangle.
• A constant function contains(double x, double y) that returns true if the specified point (x, y)
is inside this rectangle. See Figure (a).
• A constant function contains(const Rectangle2D &r) that returns true if the specified rectangle
is inside this rectangle. See Figure (b).
• A constant function overlaps(const Rectangle2D &r) that returns true if the specified rectangle
overlaps with this rectangle. See Figure (c).
In the report, draw the UML diagram for the class. Implement the class with the testing cases.
Question 9. Geometry: find the bounding rectangle (10 marks)
A bounding rectangle is the minimum rectangle that encloses a set of points in a two-dimensional
plane, as shown in Figure (d). Write a function that returns a bounding rectangle for a set of points
in a two-dimensional plane, as follows:
const int SIZE = 2;
Rectangle2D getRectangle(const double points[][SIZE]);
Write another function that returns a pointer to the bounding rectangle as follows:
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Rectangle2D* getRectanglePointer(const double points[][SIZE]);
The Rectangle2D class is defined in Question 8.
Follow the code template to write a program that enters five points and displays the bounding
rectangle’s center, width, and height.
Sample Run
Enter five points: 1.0 2.5 3 4 5 6 7 8 9 10
The bounding rectangle’s center (5.0, 6.25), width 8.0, height 7.5
The bounding rectangle’s center (5.0, 6.25), width 8.0, height 7.5
Section B. Assignment Report (30 marks)
1) For all questions, correctly describe and analyse the key functions. Provide the program testing
and execution which performs the calculation and arrives at the correct answer for the test
cases (2 marks * 9 = 18 marks)
2) For all questions, provide clear and concise code with meaningful variable names and
comments (1 marks * 9 = 9 marks)
3) Report quality: logical structure follows the template, adherence to 5-page limit, PDF format,
no major grammar/spelling errors, etc. (3 marks)
Submission
Each individual student must submit the following files:
Report: A Student Name_ID.pdf file contains a cover letter with your information. This is a
short report involves the program design, test results, and analysis comments for each question.
The report should not exceed 5 pages.
Code: A Student Name_ID.zip file should include your program implementation, with all
source code files. Please do not change the file names from the source code template. You
must submit this source code on Gradescope, including all questions, even if you have not
answered some of them.
You are allowed 5 resubmission attempts for your code on Gradescope. If you exceed this
limit, your score will be based on your last submission.
End of Coursework
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