Segmentation fault - Linked list implementation

Question

I am getting segmentation fault in my code for implementation of linked list. Any help is appreciated. Thanks. I have purposely added struct methods in here.

struct node{
    int data;
    node *next;

    node(int data){
        this->data = data;
        this->next = NULL;
    }

    node(int data, node *next){
        this->data = data;
        this->next = next;
    }
    int getData(){
        return data;
    }
    node* getNextNode(){
        return next;
    }
};

class LinkedList {
    private: 
        node *head,*tail;
    public:
        linked_list(){
            head=NULL;
            tail=NULL;
        }
        void addNode(int data){
            node *temp = new node(data);
            if(head==NULL){
                head = temp;
                tail = temp;
            }
            else {
                tail->next = temp;
                tail = temp;
            }
        }
        void display(){
            node *temp;
            temp = head;
            cout<<"PRINTING LINKED LIST"<<endl; 
            while(temp!=NULL){
                cout<<temp->getData()<<" ";
                temp = temp->getNextNode();
            }
        }

};

I get segmentation fault when I invoke the following code :

LinkedList myLinkedList;
myLinkedList.addNode(1);
myLinkedList.addNode(2);
myLinkedList.display();

Stack overflow is asking for more details, for me to post this question. Putting in some gibberish, please ignore following part : Lyrics to 'Humpty Dumpty' by Songs For Children: Humpty Dumpty sat on a wall, Humpty Dumpty had a great fall All the king's horses and all the king's men.

Answer 1

The problem is here

class LinkedList {
    private: 
        node *head,*tail;
    public:
        linked_list() {
            head=NULL;
            tail=NULL;
        }

linked_list is not the constructor for LinkedList because the spelling is different. Obviously it should be like this

class LinkedList {
    private: 
        node *head,*tail;
    public:
        LinkedList() {
            head=NULL;
            tail=NULL;
        }

Now the code you posted should not have compiled, or at least it should have produced compiler warning messages. Always pay attention to your compiler's warning messages.