warning: assignment from incompatible pointer type

[thatos]

I have the following code

typedef struct _DoublyLinkedNode {
    int value;
    struct _DoublyLinkedNode *next;
    struct _DoublyLinkedNode *prev;
}DoublyLinkedNode;
 
typedef struct DoublyLinkedList {
    int size;
    struct DoublyLinkedNode *firstnode;
    struct DoublyLinkedNode *lastnode;
}list;
 
 
list *p;
 
int main(){
    p = (list*)malloc(sizeof(list));
    DoublyLinkedNode *node;
    node = (DoublyLinkedNode*)malloc(sizeof(DoublyLinkedNode));
    node->value = 7;
    node->next = NULL;
    node->prev = NULL;
    /*
    The other code belongs here.
    */
    return 0;
}
 

When I try to do the following:-

p->firstnode = &node;
 

I get the above warning.

[Banfa]

assignment from incompatible pointer type means that you are assigning a value to a pointer variable from a pointer of a different and incompatible type.

In your code that means that p->firstnode and &node are both pointers but the types are not compatible for assignment. So you probably need to ask and answer the question what are the types of those 2 expressions.