How can I pass multiple structures in a void in c?

For example if i have two structures:

struct name {
   char name [MAX_COMMAND_LENGTH];
   int name_num;
   struct last_name *last_name;
}

struct last_name {
   struct last_name *next_last_name;
   char last_name [MAX_COMMAND_LENGTH];
   char number [MAX_COMMAND_LENGTH];
}

   void function(struct name *name, struct last_name *last name){
  // code here using variables in both functions
}

Why is it in the function can I not pass both structures for use?

Note: this isn't my actual code but rather an example of what I am trying to achieve and the fact is that I am trying to understand why you cant pass multiple structures in c and not rather how to fix my code.

I am getting this error:

pizzeria.c:169:46: warning: ‘struct the_pizzeria’ declared inside parameter list will not be visible outside of this definition or declaration