c++ help completing functions for LinkedList header

Task: fill in the functions in this header file

#ifndef LinkedList_h

#define LinkedList_h

#include

using namespace std;

struct LinkedList {

struct Link {

void* data;

Link* next;

void initialize(void* dat, Link* nxt) {

data = dat;

next = nxt;

}

}* head;

Link *end;

int size;

// This should initialize fields for the empty LinkedList

void initialize() {

}

/*

* This adds an element containing *dat

* to the end of the LinkedList.

* It assumes that *dat is dynamically allocated

*/

void add(void* dat) {

}

/*

* This returns the data at position index

*/

void* get(int index) {

}

/*

* Frees the memory of the LinkedList

*/

void cleanup() {

}

};

#endif