C Program struct error assigning type struct node from int

Question

I'm new here so sorry for not providing all information I should to get help I need but here goes.

struct node {
    int data;
    struct node* next;
    struct node* previous;
};

*currentB = MultByTen(*currentB); // this is a line in another function.
                                  // currentB is a struct node with data it in.

struct node* MultByTen(struct node* current) {
    struct node *newNode = malloc(sizeof (struct node));
    newNode->data = 0;
    newNode->next = NULL;
    while (current->next != NULL) {
        current = current->next;
    }
    newNode->previous = current;
    current->next = newNode;
    return current;
}

I'm getting "error: incompatible types when assigning to type ‘struct node’ from type ‘int’" from that one line of code I have comments next to. I'm returning a struct node* so i don't know why I'm getting this error. Any ideas?

-EDIT: currentB is a linked list with data it in. it is

struct node* currentB = malloc(sizeof(struct node));

For the purposes of an example it is 1->2->3->4->NULL and what I want MultByTen is just to add a 0 to the end of the list so it'll become 1->2->3->4->0->NULL

Answer 1

I'm guessing currentB is declared as struct node *currentB? You try to assign a pointer to a structure, to an actual instance of the structure (*currentB is not a pointer but the actual instance). The call is also wrong in this case.

The line should be:

currentB = MultByTen(currentB);

Note the missing *.

May I suggest that you try to find a tutorial on pointers and how they are handled?