Welcome to Exploring C

This site is all about digging into the C programming language — the bedrock of operating systems, compilers, and much of the software we still rely on today. 🖥️⚙️

Here you’ll find a mix of fundamentals, practical code examples, and the occasional deep dive into the quirks that make C both powerful and, at times, a little puzzling. Whether you’re chasing pointers, wrangling memory, or just curious about how C shaped the Linux kernel, this space is for you.

Topics to Explore 🔍

• The core syntax and style of Modern C ✍️
• Memory management: pointers, malloc, and friends 🧩
• Structs, unions, and other data-wrangling tricks 🗂️
• System calls and how C talks to the OS 🛠️
• Real-world examples drawn from Linux and beyond 🐧

Stick around — I’ll be adding notes, experiments, and lessons learned as I work through Modern C (Jens Gustedt, 2024) and classic texts like APUE. Thanks for visiting, and happy hacking in C! 👋

New here? Start with Hello, World — the smallest program C can run, and the shape every C file follows from here on.

Part of the BradPenney.io Network

C is the language underneath a lot of the other sites here — the Linux kernel, most compilers, and a good chunk of embedded firmware are written in it. This site is part of a family of progressive technical learning resources:

• Exploring Linux — the OS C built, and where C tooling like gcc and gdb actually runs
• Exploring Computer Science — the compiler and parser theory behind how C source becomes a running program
• Exploring Python — CPython, the reference interpreter, is itself written in C

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