If you're writing C, you'll be writing much worse than that on a regular basis. There's a reason I rarely use C any more.
But of course if you're going to reimplement OO from scratch in C you will see the entire machinery laid bare. You're only doing it in the first place either because you're committed to using C for whatever reason, or to understand OO implementation strategies.
Replying to myself to leave this here, since it's vaguely related. If anyone really want to have nightmares about OO'ish concepts in C, here is a few different ways to implement closures in C, going from relatively straightforward, to (unportable) runtime generation of assembler thunks:
You are just being glib here.
If you want simpler models see my other comments in this thread.
Oh.My.God.
At this point, you might as well be using Java.