#include <iostream>
using namespace std;
 
struct details
{
 
	int prod_id;
	//int prod_code;
	details *link;
};
 
typedef details* detailsPtr;
const int S=3;
void insert_head(detailsPtr& head, int id);
void insert_end();
void delete_head();
void delete_end();
void display(detailsPtr& head,int id);
 
int main()
{
	int id, i;
 
	detailsPtr head;
	int j=1;
	for (i=0;i<S;i++)
	{	
		cout<<"Enter product ID "<<j<<": ";
 
		cin>>id;
		insert_head(head,id);
		j++;
	//	cout<<endl;
 
 
	}
 
	display(head, id);
 
	return 0;
 
}
 
void insert_head(detailsPtr& head, int id)
{
 
	detailsPtr tmp_ptr;
 
	tmp_ptr = new details;
 
	tmp_ptr ->prod_id = id;
 
	tmp_ptr -> link = head;
 
	head = tmp_ptr;
 
}
 
void display(detailsPtr& head,int id)
{
	detailsPtr disp;
 
	disp = head;
	while(disp!=NULL)
	{
 
		cout << "ID: ";
 
		cout << disp->prod_id<<endl;
 
		disp=disp->link;
	}
}