C Roadmap

A structured path from zero to job-ready in C, covering core syntax, memory management, systems programming, and real-world project skills.

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1. Stage 1: Foundations

Setting Up the Environment
A working toolchain is required before writing any C code.
tutorialGCC Getting Started Guide tutorialInstall & Use GCC – freeCodeCamp
Basic Syntax & Data Types
Variables, types, and operators are the building blocks of every program.
docC Reference – cppreference.com tutorialC Tutorial – W3Schools
Control Flow
Conditionals and loops enable decision-making and repetition in programs.
tutorialC Control Flow – GeeksforGeeks courseCS50x – Harvard (covers C extensively)
Functions
Functions enable code reuse and modular program design.
docC Functions – cppreference.com tutorialFunctions in C – Programiz

Arrays & Strings
Arrays and strings underpin nearly all data handling in C.
tutorialC Arrays – Programiz tutorialC Strings – GeeksforGeeks
Pointers
Pointers are the heart of C and enable direct memory access.
tutorialPointers in C – Programiz videoPointers in C – CS50 Shorts
Structures & Unions
Structs group related data into composite types, key for systems design.
docStructs – cppreference.com tutorialC Structures – Programiz
Enums & Typedef
Enums and typedefs improve code readability and type safety.
docEnum Declaration – cppreference.com tutorialC Typedef & Enum – GeeksforGeeks

Stack vs Heap
Understanding memory regions prevents bugs and performance issues.
tutorialStack vs Heap – GeeksforGeeks videoMemory Layout in C – CS50
Dynamic Memory Allocation
malloc/calloc/free enable programs to manage memory at runtime.
docmalloc – cppreference.com tutorialDynamic Memory in C – Programiz
Memory Leaks & Valgrind
Detecting leaks and corruption is critical for production-quality C code.
docValgrind Quick Start tutorialDetecting Memory Leaks – GeeksforGeeks
Pointer Arithmetic
Pointer arithmetic is essential for arrays, buffers, and low-level code.
docPointer Arithmetic – cppreference.com

File Operations
Reading and writing files is fundamental to real-world applications.
docC File I/O – cppreference.com tutorialFile Handling in C – Programiz
Standard Library Deep Dive
The C standard library provides essential utilities to avoid reinventing the wheel.
docC Standard Library Reference – cppreference.com tutorialC Standard Library – GeeksforGeeks
String Manipulation Functions
string.h functions are used constantly in systems and application code.
docstring.h – cppreference.com tutorialC String Functions – W3Schools
Error Handling & errno
Proper error handling makes programs robust and debuggable.
docerrno – cppreference.com tutorialError Handling in C – GeeksforGeeks

Preprocessor & Macros
Macros and directives control compilation and enable code abstraction.
docC Preprocessor – cppreference.com tutorialC Preprocessor Directives – GeeksforGeeks
Multi-file Projects & Make
Real projects span multiple files; build tools are required to manage them.
docGNU Make Manual tutorialMakefiles Tutorial – makefiletutorial.com
Bit Manipulation
Bitwise operations are essential in embedded, networking, and OS code.
tutorialBitwise Operators in C – GeeksforGeeks docBitwise Operators – cppreference.com
Function Pointers & Callbacks
Function pointers enable runtime dispatch and callback-based APIs.
tutorialFunction Pointers in C – GeeksforGeeks

Linked Lists
Linked lists are a foundational structure and a common interview topic.
tutorialLinked List in C – GeeksforGeeks tutorialLinked Lists – Programiz
Stacks & Queues
Stacks and queues power algorithms from parsing to scheduling.
tutorialStack in C – GeeksforGeeks tutorialQueue in C – Programiz
Trees & Binary Search Trees
Trees are central to OS, databases, and compiler design.
tutorialBinary Tree in C – GeeksforGeeks tutorialBST – Programiz
Sorting & Searching Algorithms
Algorithm efficiency determines performance in systems and interviews.
tutorialSorting Algorithms in C – GeeksforGeeks courseAlgorithms – freeCodeCamp

POSIX & Linux System Calls
Systems jobs require direct use of OS APIs for processes and I/O.
docLinux man-pages (system calls)tutorialPOSIX Threads & Syscalls – GeeksforGeeks
Debugging with GDB
Proficient debugging with GDB is a core expectation for C developers.
docGDB Documentation
Unit Testing with Check or Unity
Automated testing ensures correctness and is expected in professional code.
docCheck Unit Testing Framework
Capstone Projects
Portfolio projects demonstrate job-ready skills to employers.
tutorialBuild a Shell in C – Stephen Brennan's Blog

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