Linked list with only one pointer?

[mistersunnyd]

Given

struct Node{
    int data;
    Node *next;
};
Node *head;

how do I allocate three nodes where head points to the first node? I am not allowed to declare another variable.

[Ericool]

head = new Node;
head->next=new Node;
head->next->next=new Node;

[mistersunnyd]

head = new Node;
head -> data = 1;
head -> next = new Node;
head-> next -> data = 2;
head -> next -> next = new Node;
head -> next -> next -> data = 3;

Thank you for responding. Would this be correct?

[bluesman]

You need to set the last notes next pointer to NULL
to mark that you are at the end of the linked list.

head -> next -> next -> next = NULL;

or in C++11

head -> next -> next -> next = nullptr;