How to write cpp program for Circular Queue using Linked List

 /*C++ Program for Circular Queue implementation using linked list

Cpp program to implement Circular Queue using Linked List*/
C++ Program for implementing Circular Queue with Linked List

#include<iostream>

using namespace std;

class queue

{

private:

struct node

{

int data;

node* link;

};

node *front;

node *rear;

public:

void insert(int);

void display();

void del();

queue()

{