The Complete C Learning Guide

A step-by-step guide from your first program to advanced C programming. Read the
chapters in order, type the examples yourself, and complete the exercises before
moving on.

This expanded edition is organized like a self-study book: each chapter
introduces a concept, explains the reasoning behind it, and gives you a way to
practice. Do not try to memorize every keyword at once. Learn a small idea,
write a tiny program using it, and then build on that knowledge.

Scope: C is a large language with multiple standards and platform-specific
extensions, so no single guide can list every library or implementation
detail. This guide covers the core language, the standard library, essential
tools, and the advanced topics needed to continue studying C independently.
Examples use portable C17 unless stated otherwise.

How to use this guide

1. Install a C compiler and editor. GCC, Clang, and Microsoft Visual C (MSVC)
   are common choices.

2. Save examples in files ending in .c.

3. Compile with warnings enabled. With GCC or Clang, for example:

   gcc -std=c17 -Wall -Wextra -Wpedantic -g main.c -o main
   

   Run it with ./main on macOS/Linux or main.exe on Windows. The exact
   commands can vary by compiler and terminal.

4. Type code instead of only reading it. Change it, predict the output, then
   run it.

5. Keep a notebook of errors and what fixed them. Compiler warnings are useful
   information; do not ignore them.

Code examples include both complete programs (with main) and focused
snippets. A focused snippet may rely on names or variables introduced in the
surrounding explanation; use the stated assumptions and required headers.
When learning a new topic, first compile a complete example, then change one
part and observe the result.