I joined a project that has been in development for four years. After a couple of weeks of getting used to what has already been done I saw some strange coding.
One thing that struck me in particular was how often I saw pointers to pointers of objects being passed as arguments without any obvious reasons.
Only after I got to write a new functionality myself did I see why that was done.. as I needed to do it too. I had to allocate the memory for an object that was given as the parameter.
C is a hell of a language.. just as I thought I was good at it things like this happen.