🎓 CSE 108 — Object Oriented Programming Sessional

Bangladesh University of Engineering and Technology (BUET)

A comprehensive collection of assignments, online assessments, and practice problems covering core Object-Oriented Programming concepts in C++ and Java.

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📑 Table of Contents

• About
• Topics Covered
• Repository Structure
• Offline Assignments
• Online Assessments
• Practice Problems
• Related Repositories
• Tech Stack
• How to Run
• Author

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📖 About

This repository contains all coursework for the CSE 108: Object Oriented Programming course. The course transitions from foundational C++ OOP concepts (classes, memory management, operator overloading) to advanced Java topics (inheritance hierarchies, interfaces, exception handling, multithreading, collections, and generics).

Each assignment is self-contained with its respective problem statement and solution.

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🧠 Topics Covered

#	Topic	Language	Assessment
1	Classes, Encapsulation, Dynamic Memory	C++	Offline 1, Online 1
2	Constructors, Copy Constructors, Destructors	C++	Offline 2, Online 2, Online 3
3	Operator Overloading	C++	Offline 2, Online 3
4	Inheritance & Polymorphism	C++	Practice
5	Function Overriding & Virtual Functions	C++	Practice
6	Classes, Encapsulation, Arrays of Objects	Java	Online 4
7	Abstract Classes & Inheritance	Java	Offline 3, Online 5
8	Interfaces & Custom Exceptions	Java	Offline 3, Online 5
9	Multithreading (Thread, join)	Java	Online 6
10	Collections, Generics, File I/O	Java	Practice

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📂 Repository Structure

CSE_108/
├── 📁 Offline/                     # Lab assignments
│   ├── 📁 Offline_1/               # C++ — Classes & Dynamic 2D Matrix
│   ├── 📁 Offline_2/               # C++ — Political Party Management System
│   └── 📁 Offline_3/               # Java — Vehicle Workshop (Inheritance + Interface)
│
├── 📁 Online/                      # Timed in-class assessments
│   ├── 📁 Online_01/               # C++ — FileHandler Class & File I/O
│   ├── 📁 Online_02/               # C++ — Playlist (Song + Album Management)
│   ├── 📁 Online_03/               # C++ — ShiftArray (Operator Overloading)
│   ├── 📁 Online_04/               # Java — Gym Membership Fee Calculator
│   ├── 📁 Online_05/               # Java — Delivery Service (Abstract + Exception)
│   └── 📁 Online_06/               # Java — Multi-threaded Prime Sum
│
├── 📁 Practice/                    # Self-practice problems
│   ├── 📁 CPP/                     # Inheritance, Overriding, Operator Overloading
│   └── 📁 Java/                    # Banking System, Movie Collections & Generics
│
├── .gitignore
└── README.md

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📝 Offline Assignments

Offline 1 — Figure Matrix (C++)

Concepts: Classes, Encapsulation, Dynamic Memory Allocation, 2D Arrays

Implementation of a Figure class that manages dynamically allocated 2D integer matrices. Handles matrix creation, naming based on dimensions, and memory management using constructors and destructors.

📄 View Files

File	Description
Ass1_2405087_Dec25.cpp.cpp	Complete solution with Figure class
Question.docx	Problem specification

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Offline 2 — Political Party Management System (C++)

Concepts: Composition, Copy Constructor, Deep Copy, Dynamic Arrays, Friend Functions

A system to manage political parties and their members. Features include adding/removing members, nominating candidates, and displaying party details with proper deep-copy semantics.

📄 View Files

File	Description
2405087.cpp	Solution — PartyMember & Party classes
CSE108_Offline 2_Specifications.pdf	Problem specification

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Offline 3 — Vehicle Workshop Manager (Java)

Concepts: Abstract Classes, Inheritance, Interfaces, Custom Exceptions, Polymorphism

A vehicle service workshop simulation featuring an abstract Vehicle class extended by Car, Bike, and Truck. Implements a Serviceable interface and uses a custom ServiceException for validation. The WorkshopManager demonstrates polymorphic service cost calculations.

📄 View Files

File	Description
Vehicle.java	Abstract base class with service cost logic
Car.java / Bike.java / Truck.java	Concrete vehicle implementations
Serviceable.java	Service interface
ServiceException.java	Custom checked exception
WorkshopManager.java	Manager class with polymorphic operations
Main.java	Driver program

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💻 Online Assessments

Online 01 — FileHandler Class (C++)

Concepts: File I/O (ofstream), Resource Management, Encapsulation

Implements a FileHandler class that wraps file operations, ensuring files are opened and closed only once during the object's lifetime.

📄 View Files

File	Description
main.cpp	Complete solution with FileHandler class
Question.pdf	Problem specification

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Online 02 — Playlist Management (C++)

Concepts: Composition, Dynamic Arrays, Class Relationships

A music playlist system with Song and Album classes supporting song management, display, and album operations.

📄 View Files

File	Description
main.cpp	Complete solution with Song & Album classes
July 2025 CSE 108 _ Online 2 - B1+B2.pdf	Problem specification

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Online 03 — ShiftArray (C++)

Concepts: Operator Overloading (+, -, ++, --, <<), Deep Copy, Destructor

Custom array class with circular shift operations via overloaded operators. Demonstrates proper memory management and deep-copy semantics.

📄 View Files

File	Description
main.cpp	Complete solution with overloaded shift operations
Online 3 - B1_B2.pdf	Problem specification

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Online 04 — Gym Membership Fee Calculator (Java)

Concepts: Classes, Arrays, Encapsulation, Object Composition

Calculates late fees for gym members across multiple plans using GymMember and Plan classes with fee computation logic.

📄 View Files

File	Description
Main.java	Driver program and entry point
GymMember.java / Plan.java	Member and Plan business logic
Online4_B.pdf	Problem specification

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Online 05 — Delivery Service System (Java)

Concepts: Abstract Classes, Inheritance, Custom Exceptions, Input Validation

A delivery service with an abstract DeliveryRequest base class, extended by FoodDelivery and ParcelDelivery. Uses InvalidRequestException for robust input validation.

📄 View Files

File	Description
Main.java	Driver program and execution simulation
DeliveryRequest.java	Abstract base delivery request class
FoodDelivery.java / ParcelDelivery.java	Concrete request types
InvalidRequestException.java	Custom exception for input validation
CSE108_Online-5_Set_B_Question.pdf	Problem specification

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Online 06 — Multi-threaded Prime Sum (Java)

Concepts: Multithreading, Thread class, join(), Range Partitioning

Computes the sum of all prime numbers in a given range using multiple threads. Divides the work into chunks and aggregates partial sums via Thread.join().

📄 View Files

File	Description
Main.java	Multi-threaded solution and logic
Sec B.pdf	Problem specification

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🧪 Practice Problems

C++ Practice

Problem	Topics	Resources
PP_week_04.cpp	Inheritance, Polymorphism, Virtual Functions	📕 Specification
Inheritence_practice.cpp	Class Hierarchies, Method Overriding	📁 Source Folder
function_overridding.cpp.cpp	Virtual Functions, Runtime Polymorphism	📁 Source Folder
operator_overloading_practice.cpp	Operator Overloading	📁 Source Folder

Java Practice

Problem	Topics	Files
Banking System (Java Practice 1/)	Classes, Account & Branch management	Account.java / Branch.java / Main.java
Movie Collection (Java_Practice_Collections_Generics/)	ArrayList, HashMap, Generics, File Parsing, Comparable	Main.java / Movie.java / movies.txt / 📕 Specs

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🔗 Related Repositories

Explore other academic repositories containing coursework, implementations, and study materials:

Repository	Description	Language / Tech
🌌 OOPverse	A comprehensive repository dedicated to Object-Oriented Programming design patterns, principles, and practice problems.	Java / C++
🧬 DSA Genesis	C++17 implementations of core Data Structures & Algorithms at BUET CSE (CSE-105 & CSE-207), covering trees, graphs, sorting, and dynamic programming.	C++17
🧪 CSE 106	Laboratory coursework, programming assignments, and exam solutions for Data Structures & Algorithms I Sessional at BUET.	C / C++

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🛠 Tech Stack

Tool	Purpose
C++ (g++)	OOP fundamentals — memory management, operator overloading
Java (JDK 17+)	Advanced OOP — inheritance, interfaces, threading, collections
Git	Version control
VS-Code, IntelliJ	Writing & Editing Code

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🚀 How to Run

C++ Programs

# Compile
g++ -o output filename.cpp

# Run
./output

Java Programs

# Compile
javac FileName.java

# Run
java FileName

Note: Some Java files use package declarations (e.g., package Online.Online_04;). To run these, compile and execute from the project root:

javac Online/Online_04/*.java
java Online.Online_04.Main

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👤 Author

Badhon Pain

• 🎓 Student ID: 2405087
• 🏛 Bangladesh University of Engineering and Technology (BUET)
• 🔗 GitHub: @BadhonPain

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Maintained as part of coursework at BUET.