Deleting a node.cpp

#include<bits/stdc++.h>

using namespace std;

class Node
{
	public:
	int data;
	Node* next;
};
void push(Node** head_ref,int new_data)
{

	Node* new_node=new Node();

	new_node->data=new_data;
	new_node->next=(*head_ref);
	(*head_ref)=new_node;
}
void deleteNode(Node** head_ref,int key)
{
	Node* temp=(*head_ref),*prev;
	
	if (temp != NULL && temp->data == key) 
    { 
        *head_ref = temp->next;   // Changed head 
        free(temp);               // free old head 
        return; 
    } 
    
    while (temp != NULL && temp->data != key) 
    { 
        prev = temp; 
        temp = temp->next; 
    } 
     if (temp == NULL) return;
     
     prev->next = temp->next; 
  
    free(temp);
}

void printList(Node *node) 
{ 
    while (node != NULL) 
    { 
        cout<< node->data; 
        node = node->next; 
    } 
} 
int main()
{
	
	Node* head = NULL; 
  
    push(&head, 7); 
    push(&head, 1); 
    push(&head, 3); 
    push(&head, 2); 
  
    puts("Created Linked List: "); 
    printList(head); 
    deleteNode(&head, 1); 
    puts("\nLinked List after Deletion of 1: "); 
    printList(head); 
}