Someone else ask him to use cdcel a small utility that translate C syntax into human readable words. For example consider this code
int (*sched_callback) (pid_t, struct sched_param*);
declare sched_callback as pointer to function (pid_t, pointer to struct sched_param) returning int
Here a short description about cdecl
Cdecl is a program which will turn English-like phrases such as "declare foo as array 5 of pointer to function returning int" into C declarations such as "int (*foo)()". It can also translate the C into the pseudo-English. And it handles typecasts, too. Plus C++. And in this version it has command line editing and history with the GNU readline library.
By the way, the answer of his question according to cdecl is
declare pa as function returning pointer to array 4 of char
Give it a try, it's perfect for deep understanding the C language.