pointer to incomplete class type is not allowed - singly linked list

Question

I\'m trying to create a simple singly linked list. Previously, I successfully did this with no errors, however now I encounter an error. I suspect that there is some kind of pro

Answer 1

typedef struct
{
} Product;

Declares a type alias called Product for an unnamed struct - however you need a named struct for your forward declaration struct Product *next;, otherwise the compiler cannot determine which definition it belongs to.

The simplest solution is to give the struct a name:

typedef struct Product
{
    int value;
    struct Product *next;
} Product;