Don't get me started...

It is called a struct. It holds arbitrary collection of any type of data safely while enabling the lazy programmer to pass only one parameter around. It is also safe (as must as it can be in C) unlike pointers that hide data behind their back and are just asking for trouble.

I will ignore all the problems and point out the worst offender, stack allocation example. That is not how you allocate arbitrary data on the stack, automatic char array is not malloc. In fact, in C you can't do it without using special platform specific functions. Anything else will cause undefined behavior.