Ask HN: Small programming projects / challenges for C beginners

Hi HN,

I've been teaching myself C programming recently. I think I have a good enough grasp of the language constructs like pointers, typedefs etc. I'd like to move beyond the usual (and frankly quite boring) hello world tutorials but I'm having trouble coming up with small enough projects that are doable and big enough that they're still exciting or would allow me to apply my recently gained knowledge.

So how did you guys learn C ? Do you have any ideas for such projects ?

Cheers