01 — Reddit

Reddit is your single highest-ROI C community, mostly because r/C_Programming is unusually well-moderated and populated by working engineers who show up because it’s a fast forum, not because they get paid. Below are the four subs that will actually help you across the 13 months, with the specific threads and weekly rituals to plug into.

The four subs

Sub

Members (mid-2026, approx)

Focus

When to be there

r/C_Programming

~230K

Pure C: language, toolchain, projects, help

Every day. This is your home.

r/learnprogramming

~4.6M

Beginner-general; useful for early asking-questions habits

M1-M2 only, then leave

r/embedded

~230K

MCU/RTOS/bare-metal, heavy C

M8+ when you touch memory-constrained systems

r/systems (r/systemsprogramming is a smaller alt)

~30K

OS-level, kernels, syscalls

M7+

Also worth a quarterly sanity check: r/programming (front page for general programming controversy), r/cpp (C++ but the ABI/UB discussions apply), r/linux_programming, r/opensource.

r/C_Programming — the specific rituals

  • Weekly Discussion / Feedback thread — usually pinned Sunday/Monday. Post small snippets here rather than as top-level posts.

  • “What are you working on this week?” thread — monthly. Post one line every month you’re active. Public accountability.

  • New-post triage — sort by New once a day, spend 10 minutes trying to answer easy ones. This is the fastest way to level up your teaching muscle.

  • Wiki + FAQ — https://www.reddit.com/r/C_Programming/wiki/ — read this once, cover to cover, in your first week. It saves the mods 300 duplicate questions per year.

Quality of answers

Consistently the best free C help online. When someone posts a bad strcpy bug, you’ll see three answers pointing at the right thing (buffer size, off-by-one, strncpy’s trailing-null trap) within an hour, often with links to cppreference. The mods actively remove homework-dumps and LLM-generated garbage.

Adjacent subs worth a quarterly skim

  • r/rust — read the “why we switched from C” posts. Sharpens your defense of when C is still right.

  • r/programminghumor — skip unless you want brain rot.

  • r/india / r/developersIndia — for local-market questions (comp bands, Zoho vs Postman culture), not for C help.

What most people get wrong about r/C_Programming

They ask, “what should I build to learn C?” and get downvoted because the wiki answers it. Or they ask “which is the best book” and get 40 identical answers pointing at K.N. King and Beej. Do your search first (Reddit search + Google site:reddit.com/r/C_Programming <topic>). Save your posting karma for actual, specific problems.

Return to README.md · Next: 02_discord_servers.md