Code Editors and IDEs
You can write the whole greenhouse logger in a plain text editor, and plenty of experienced C programmers do. A good setup, though, shows mistakes the moment you type them, completes long names, and builds with one key. The skill is knowing which part does what.
The rule
The editor shapes the text; the compiler decides whether it is C.
The popular choices:
| Tool | What it is | How it understands C |
|---|---|---|
| VS Code | Free editor with extensions | Microsoft's C/C++ extension, or the clangd extension |
| Vim / Neovim | Keyboard-driven terminal editors | A language server such as clangd (Neovim has an LSP client built in) |
| CLion | Full IDE from JetBrains | Built-in analysis, CMake projects |
| Visual Studio | Full IDE on Windows | MSVC and its own analysis |
A language server is a background program that reads your code the way a compiler does and reports errors, warnings and completions to the editor. clangd is the common one for C, and it works the same in VS Code, Neovim and many other editors.
The language server has to know how you build. With no information it guesses, so tell it. The simplest way is a file named compile_flags.txt next to your code, one flag per line:
-std=c17
-Wall
-WextraBigger projects generate a compile_commands.json from their build system instead.
None of these tools includes a compiler by magic. VS Code and Vim edit text; the GCC or Clang you installed still does the building.
The shortcut
Keep the terminal build working, and treat the editor as a convenience on top. If gcc -std=c17 -Wall -Wextra -o logger logger.c succeeds, the code is fine, whatever the editor shows.
Compiler first
Check
gcc --versionin a terminal. No compiler, no build, whatever the editor promises.
In Neovim the steps are the same idea: install clangd, enable it through the built-in LSP client, and map a key to run your build command.
The common trap: a red squiggle under code that builds perfectly in the terminal. That almost always means the language server is using different flags or include paths from your real build.
Drills
Answer fast — trust the rule.
You install VS Code and its C extension on a fresh laptop. Can you now build the logger?
What is clangd?
The logger builds cleanly with gcc -std=c17, but the editor underlines valid code in red. What is the most likely cause?
Which file lists compiler flags for clangd, one per line?
Remember
- The editor shapes the text; the compiler decides whether it is C.
- Shortcut: keep the terminal build working and give the editor the same flags.
- Trap: a red squiggle on code that builds usually means mismatched flags, not broken code.