SLL array indexed

#include <stdio.h>

int main(void) {
    printf("SLLi\n");
    return 0;
}

struct Node {
    void *data;
    int next;    // struct Node *next;
    int prev;    // struct Node *prev;
 };
 
struct List {
    int head;    // struct Node *head;
    int tail;    // struct Node *tail;
    size_t size; // num of nodes in array
    int storage [10];
};