The time [0] I found out about ptr_b in

  int* ptr_a, ptr_b;

isn't actually initialized as a pointer I changed all my C code to marking * before the variable name, fun times. It's helpful to think int as the base type and * the indicator of functionality like [] and ().

Also just found out the author was the developer of Adium [1], which is one of my favorite softwares (best logo) on macOS.

[0] http://c-faq.com/decl/charstarws.html

[1] https://adium.im/