Question

Insert is a method which appends an item to the end of my linked list.

Can’t figure out how to code for the case where Node is null, and I just want to add to it.

struct Node{
       int data;
       Node *next;

       Node(int data):data(data),next(NULL){}

       void insert(int data){
            if (this==NULL){
               this=new Node(data); // compiler is complaining here.
                                    // how would I go about setting the value of this (which is presently NULL) to a new Node?
            }
       }
}

Answer 1

you can not assign a value to this pointer which is a special keyword and should always point to a valid block of memory. by looking at your usage, could you be trying to mean this:

void insert(int data){
            if (!next){
               next = new Node(data);

            }