University Coursework Repository

This repository contains solutions and projects developed for various Computer Engineering and Informatics Department (CEID) laboratory exercises and courses.

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💻 1. C Programming Lab (1st Semester)

A collection of foundational programming exercises focusing on core C language concepts, control flow, functions, and string handling.

File	Description	Concepts Covered
MostFrequentNumber.c	Finds the longest sequence of the same consecutive integer in a stream of input numbers.	Loops, input handling.
FourDigitNumbers.c	Finds and prints all 4-digit Armstrong Numbers (where the number equals the sum of its digits raised to the 4th power).	Loops, arithmetic manipulation, array pre-calculation.
Divisors.c	Determines if an integer is a Prime Number and, if not, lists all its proper divisors.	Prime number check, functions, pointers.
HailstoneSequenceV*.c	Implements the Hailstone (Collatz) Sequence calculator, printing the sequence until it reaches 1.	Loops, conditional logic.
Menu.c	A menu-driven calculator program supporting basic arithmetic, logarithms (log10), and powers (pow).	switch statements, mathematical functions.
StringHandling.c	Basic C program demonstrating string input (getStringV2) and output operations.	String handling, getchar().
WordsHandlingV1.c	Command-line application for managing a list of words (add, display, sort, search, statistical analysis).	Arrays of strings, strcmp(), nested loops for sorting.
FibonacciV*.c	Calculates and prints terms of the Fibonacci Sequence using both recursive (V1) and iterative array (V2) methods.	Recursion, arrays, iterative calculation.
Orders.c	Calculates the total cost of a bottle order, applying tiered discounts based on total cost or quantity.	if/else if logic, floating-point arithmetic.
OrdersHandlingApp.c	A robust CLI application for managing Factory Orders (Pending, Ready, Closed) with functionality to execute, close, and save/load data to files.	struct, file I/O (fopen, fscanf), complex menu management.
ClassroomApp.c	A management system for seating students in a lab, including registration, searching by name/ID/position, and data persistence using binary files.	struct, File I/O (binary), 2D arrays, string comparison.

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🛠️ 2. C++ Lab (2nd Semester)

Exercises demonstrating object-oriented programming (OOP) principles in C++, focusing on classes, inheritance, operator overloading, and STL containers.

File	Description	Concepts Covered
askisi1/kouti.cpp	Defines the Kouti (Box) class and demonstrates Operator Overloading by defining operator+ to add the dimensions of two boxes.	Classes, constructors, operator overloading.
askisi1/q1.cpp	Reads two $N \times N$ matrices from user input and calculates their element-wise sum.	Dynamic memory allocation (new int*[N]), nested loops, console I/O.
askisi2/q1*.cpp	Demonstrates usage of the C++ std::vector container, including dynamic size changes (push_back), access, iteration, and resizing.	STL vector, iterators.
askisi2/q2.cpp	Implements a simple Kouti class to calculate the Ogkos (Volume) using get and set accessor methods.	Class methods, encapsulation.
askisi2/q3.cpp	Demonstrates Polymorphism and Multiple Inheritance using Polygon (virtual function), Rectangle, and PaintCost classes.	virtual functions, Multiple Inheritance, object pointers.
rock_paper_scissors.cpp	A simple console-based Rock-Paper-Scissors game implemented using a C++ class with helper methods.	Classes, enum types, random number generation.

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☕ 2. Java Lab (2nd Semester)

Exercises exploring core Java OOP concepts, inheritance, method overriding, and container classes.

File	Description	Concepts Covered
Askisi1/Age.java	Handles command-line arguments (args[]) to process and print a person's name and age.	Command line arguments, if/else if control flow.
Askisi2/Window.java	Simple class demonstrating basic constructors and accessor methods (getSize).	Class structure, encapsulation.
Askisi3/MWindow.java	Demonstrates Inheritance and Method Overriding where MWindow extends Window, showing access to superclass methods (super.SetSize).	extends, super, method overriding.
Askisi4/Tester.java	Demonstrates Polymorphism and Collection Handling. It tests an ArrayList and native arrays containing mixed Robot and RobVehicle objects.	Inheritance hierarchy (Robot $\rightarrow$ RobVehicle), Polymorphism, ArrayList, Iterator.

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📐 3. Algorithms Lab (3rd Semester)

Projects focused on implementing and analyzing classical graph and sorting algorithms.

File	Description	Algorithm / Concept
ex1.cpp	Finds the maximum even and minimum odd values in a list of numbers loaded from a file and performs in-place swaps.	Array traversal, basic min/max search.
ex2.cpp	Implements a Max-Heap data structure with core operations (insert, extractMax, replaceMax) including detailed tracing of the heapifyUp and heapifyDown processes.	Max-Heap, Priority Queue, Heapify.
ex3.cpp	Implements the Merge Sort algorithm to sort a list of numbers in descending order, combined with a Binary Search implementation for lookup.	Divide and Conquer, Merge Sort (descending), Binary Search.
ex4.cpp	Implements Depth First Search (DFS) on a graph to systematically traverse and classify every edge as either Tree, Forward, Back, or Cross.	DFS, Edge Classification.
ex5.cpp	Implements Breadth First Search (BFS) to find the shortest path/level from a starting node to a target node in an unweighted graph.	BFS, Shortest Path in unweighted graphs, queue usage.