Question

How do you declare the head Node*?

Answer 1

To declare the head Node*, you need to define a struct or class for the Node and create an instance of that class or struct, assigning it to the head pointer.

Step-by-step explanation:

To declare the head Node*, you first need to define a struct or class for the Node. For example, in C++, you can declare a class called Node with a data member and a pointer to the next Node. Then, to declare the head Node*, you can simply create an instance of the Node class and assign it to the head pointer. Here's an example:

class Node {
public:
int data;
Node* next;
};

int main() {
Node* head = new Node();
head->data = 5;
head->next = nullptr; // or NULL in older versions of C++
return 0;
}