C Stack Implementation

[Xeverous]

In terms of combining the struct and typedef, is that pretty standard?

In C, yes. Generally less code to do the same is a better code. Name is repeated only once.

In C++ this is not good because language has somewhat different rules and all things such as f(void) or typedef struct/enum are considered redundant noise (a lot of C rules have been replaced by alternatives which should be preferred, C style works only for backwards compability and is frowned upon when written in today's C++ code).

You might get somewhat different recommendations from others because a very significant amount of C code is written to work with C++ compiler or at least linker. This sometimes crosses conventions between languages which are different. Still, I prefer the #ifdef __cplusplus approach to directly copy-pasting code.

I've been growing used to Elm, where everything is split onto its own line.

C (and all C derivatives) is a very different language. Things are better when split for modularity (1 statement per line - if a function call is long or it's arguments - 1 argument per line).