CPP

declare nullptr c++

int  *ptr = NULL;

nullptr c++

#include<iostream> 
#include<utility> 
 
class Node{ 
public: 
    char data; 
    Node*next; 
}; 
 
int main(){ 
    //step 1 
    Node*head = NULL; 
    Node*second = NULL; 
    Node*third = NULL; 
    Node*fourth = NULL; 
    Node*fifth = NULL; 
    Node*last = NULL; 
    //step 2 
    head = new Node; 
    second = new Node; 
    third = new Node; 
    fourth = new Node; 
    fifth = new Node; 
    last = new Node; 
     
    //step 3 
    head->data = 'C'; 
    head->next = second; 
 
    second->data = 'P'; 
    second->next = third; 
 
    third->data = 'E'; 
    third->next = fourth; 
 
    fourth->data = '0'; 
    fourth->next = fifth; 
 
    fifth->data = '1'; 
    fifth->next = last; 
     
    //step 4 
    last->data = '0'; 
    last->next = nullptr;
}