#include<iostream>
using namespace std;

struct list
{
    int num;
    list *next;
};
list *el, *first, *previ;
void createList()
{
    el=new(list);
    first=el;
    do
    {
        previ = el;
        cout<<"a = ";
        cin>>el->num;
        el->next=new(list);
        el=el->next;
    }
    while(previ->num != 0);
    previ->next=NULL;
}
void printList()
{
    el = first;
    while(el->next != NULL)
    {
        cout<<el->num<<"\t";
        el=el->next;
    }
}
void delete2nd ()
{
    list *q;
    q = first-> previ;
    if (q->previ != NULL) {
        first-> previ =q-> previ;
        delete q;
        cout << "\n\n2nd element deleted \n";
        printList();
    }
    else    cout<<"\n2nd element doesn't exist\n";
}
void main()
{
    createList();
    cout<< "Created List : \n";
    
    printList();
    delete2nd();
    
    cin.get();
    cin.get();
}