What is this strange function definition syntax in C? -

this question has answer here:

i've seen few function definitions while playing gnu bison:

static value ripper_pos(self)     value self; {     //code here }

why type of self outside of parenthesis? valid c?

those old k&r style function parameter declarations, declaring types of parameters separately:

int func(a, b, c)    int a;    int b;    int c; {   return + b + c; }

this same more modern way declare function parameters:

int func(int a, int b, int c) {   return + b + c; }

the "new style" declarations universally preferred.

EIght