C++ code to Print the values in Singly and Doubly Linked List

void myClass :: print()
{
cout << endl;
temp = head;

if (head == NULL)
{
cout << endl;
cout << " Sorry! Link List is empty" << endl;
cout << endl;
Sleep(1000);
return;
}

while (temp != NULL)
{
cout << temp->data << endl;
temp= temp->next;
}

system("pause");

}

C++ Program to insert a new nod and Value in Doubly Link List

#include <iostream>
using namespace std;

struct nod
{
int data;
nod *next;
nod *prev;
};

class myClass
{
private:
nod *head;
nod *temp;

public:
myClass()
{
head = NULL;
temp = NULL;
}

void insert();
void print();
};