Thread: my error is storage class specified for parameter

i need a bit of help. i have the following code

Code:

#ifndef PERSON_H_INCLUDED
#define PERSON_H_INCLUDED
#include <stdio.h>
#include <stdlib.h>

typedef struct nod
{
  char name[50];
  unsigned int birthdate;
  char address[100];
  char cnp[14];
    struct nod *next;
    struct nod *prev;
} PersonEntryT;


typedef struct
{
        int size;
    PersonEntryT *last;
    PersonEntryT *first;
    }ListDT;


extern ListDT *createDList();
extern PersonEntryT *createDNode( char name[], unsigned int birthdate, char address[], char cnp[]  );
extern PersonEntryT *insertDDepOnKey(char a[], PersonEntryT  *p, ListDT *L);
extern PersonEntryT *findDyear(  int key,  ListDT *L);
extern PersonEntryT *findDcnp(char key[],  ListDT *L);
extern char *printDItem(PersonEntryT  *pItem);
extern PersonEntryT *insertDAtEnd(PersonEntryT *p, ListDT *L);
extern void deleteDItem (void *pItem);
extern int keyCmp(int a, int b);


#endif // PERSON_H_INCLUDED

after compiling i get the following error serie:

Code:

error: storage class specified for parameter 'insertDDepOnKey' 
error: storage class specified for parameter 'findDyear' 
error: storage class specified for parameter 'findDcnp' 
error: storage class specified for parameter 'printDitem' 
error: storage class specified for parameter 'insertDAtEnd' 
error: storage class specified for parameter 'deleteDItem' 
error: storage class specified for parameter 'keyCmp'

what is the problem?
i saw that there was another person who had the same problem, i checked all the possible remedees that u suggested him, but i didn't find any missing semicolon or parathesis. Also this is my only header file in the program, the parameters are checked, their type and order is correct. Thought i bet the problem is with them .
Thank u for any help, suggestion.(PS i would need an urgent respons)

hey u were right!!!thank u sooo much!! the extern command was the problem.
thank u!!!!

i checked several times, seems like no missing paranthesis to me, but i may be mistaking. It works now though, so thanks for your time brewbuck and laserlight