I would focus on sources that use C11 or C18, since there are some niceties in the newer standards. As a reference, I like QEMU's source code[1]. It's huge, bu

I would focus on sources that use C11 or C18, since there are some niceties in the newer standards. As a reference, I like QEMU's source code[1]. It's huge, but the style and practices found in any file will help you get a grip on good C. [1] https://github.com/qemu/qemu https://github.com/qemu/qemu