Linked list implementation using class in cpp

//linked list implementation using class in c++.
#include <bits/stdc++.h>
using namespace std;
class node{
    friend class linked;
    int data;
    public:
    node *next;
    node(){
        data=0;
        next=NULL;
    }
};
class linked{   
    public:
    node *start=NULL;
    node *temp=NULL;
    node *head;
    void insert(int item);
    void print();
};
void linked::insert(int data){
    head = new node();
    head->data=data;
    if(start == NULL){
        start=head;
        temp=head;
        start->next=NULL;
    }
    else{
        while(temp->next!=NULL){
            temp=temp->next;
        }
        temp->next=head;
        head->next=NULL;
    }
}
void linked::print(){
    node *head=start;
    while(head){
        cout<<head->data<<endl;
        head=head->next;
    }
}
int main() {
   linked list;
    for(int i=1;i<11;i++)
        list.insert(i);
    list.print();
    return 0;
}