Data Structures in C

This repository contains study notes, exercises, and implementations of fundamental Data Structures (ED) and algorithms, all written in C. This project is focused on understanding how data structures work internally, improving programming logic, and building a strong foundation in algorithms and problem solving.

It also includes the study of Abstract Data Types (TADs), such as stacks and queues, showing how they can be modeled and implemented in a practical way. In addition, the repository covers work with arrays, linked lists, stacks, queues, sorting algorithms, and C rules exercises, all in a direct and hands-on manner.

All code in this repository is written in C, and the programs can be compiled with gcc.

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Project Structure

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├── exercicios        # C exercises: arrays, pointers, malloc, stacks & practice problems
├── lista-ligada      # Linked lists: singly, doubly, circular & with/without head
├── pilha-fila      # Stack (LIFO) and Queue (FIFO) implementations
└── sorting           # Sorting algorithms

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What's inside each directory:

Directory	Description
exercicios	Hands-on C exercises and exam questions covering arrays, pointers, dynamic memory (malloc), random lists, and stack-based problems. Great for practicing C fundamentals and logic.
lista-ligada	Linked list implementations in their main variations: doubly linked, circular, and singly linked with and without head node — each as a reusable package of functions.
pilha-fila	Classic abstract data types: a Stack (pilha, LIFO) and a Queue (fila, FIFO), each implemented with its own struct and operations.
sorting	Sorting algorithms written from scratch.

Goal

The main purpose of this repository is to:

• practice data structures in C
• study Abstract Data Types (TADs)
• improve programming logic
• understand memory management
• study algorithm behavior
• prepare for technical interviews and academic exercises

How to Compile with GCC

To compile a C program using gcc, use the following command:

gcc file_name.c -o output_name

Example:

gcc main.c -o main

To run the compiled program:

./main

If your program uses more than one file, you can compile them together:

gcc main.c list.c queue.c stack.c -o program