#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>

// Declare a "struct type" called "struct Node" for a linked list of ints.
struct Node {           // On our platform…
    int value;          //   4 bytes
    struct Node* next;  //   8 bytes
};       // entire object:  12 bytes


int main(int argc, char* argv[]) {
    // Create a linked list with one int on the HEAP.

    // Create one node with value 5

    struct Node* head = malloc(sizeof(*head));
    // (*head).value = 5;  // ugly way
    // (*head).next  = NULL;
    // head -> value = 5;     // nicer way
    // head -> next  = NULL;  // nicer way
    //
    // Best way:  Assign to a whole struct object at once.
    (*head) = (struct Node) { .value = 5, .next = NULL };

    printf("head -> value == %d\n", head -> value);
    printf("head -> next  == %p\n", (void*)head -> next);

    // Add another node
    struct Node* new_node = malloc(sizeof(*new_node));
    (*new_node) = (struct Node) { .value = 6, .next = NULL };

    head -> next = new_node;

    free(head);

    return EXIT_SUCCESS;
}
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