C++ Linked list

linkedlist.cpp

// Linkedlist.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
using namespace std;


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


class linkedList{
private:
	node *head;
public:
	linkedList(){
		head = NULL;
	};

	node *newNode(int val){
		node *n = new node;
		n->data = val;
		n->next = NULL;
		return n;
	};

	void createList(int a[], int length){
		if(head==NULL)
			head = newNode(a[0]);
		node *curr = head;
		for(int i=1;i<length;i++){
			node *n = newNode(a[i]);
			curr->next = n;
			curr = n;
		}
	};

	void printAll(){
		node *curr = head;
		while(curr!=NULL){
			cout << curr->data << " ";
			curr = curr->next;
		}
	};

	int length(){
		node *curr=head;
		int count = 0;
		while(curr!=NULL){
			++count;
			curr=curr->next;
		}
		return  count;
	};

	void addFront(int val){
		node *n = newNode(val);
		n->next = head;
		head = n;
	}

	void addTail(int val){
		node *curr = head;
		if(head==NULL)
			head = newNode(val);
		else{
			while(curr->next!=NULL)
				curr=curr->next;
			node *n = newNode(val);
			curr->next = n;
		}

	};



};




int _tmain(int argc, _TCHAR* argv[])
{
	linkedList ll;
	int a[] = {1,2,3,4,7};
	ll.createList(a,5);
	ll.addFront(9);
	ll.addTail(100);
	ll.printAll();

	char letter;
	cin >> letter;

	return 0;
}