Linked List with void * data

// Example program
#include <stdio.h>
#include <stdlib.h>
struct NodeList
{
    void* data;
    struct NodeList* next;
} *head = NULL;

void prnint(void* p) {
    printf("%c ", *(char*)p);
}

void createList(char a[], int n, struct NodeList** r)
{
    struct NodeList* root;
    root = (struct NodeList*)malloc(sizeof(struct NodeList));

    void* p = malloc(sizeof(a[0]));
    *(char*)p = a[0];
    root->data = p;
    root->next = NULL;



    struct NodeList* last = root;
    for (int i = 1; i < n; i++)
    {
        struct NodeList* t = (struct NodeList*)malloc(sizeof(struct NodeList));
        last->next = t;
        void* p2 = malloc(sizeof(char));
        *(char*)p2 = a[i];
        t->data = p2;
        t->next = NULL;
        last = t;
    }

    (*r) = root;
    //   prnint(head->data); // принтираме стойността помощната функция


}

void printList(struct NodeList** Head)
{
    struct NodeList* p = *Head;
    while (p)
    {
        prnint(p->data);
        p = p->next;
    }
}


int main()
{
    char a[] = { 'a','b','c' };
    createList(a, sizeof(a) / sizeof(a[0]), &head);
    //prnint(head->data);
    printList(&head);
}