#include <iostream>
#include <fstream>
#include <string>
#include <sstream>
#include <cstdlib>

using namespace std;

struct element
{
    string data;
    element* next;
    element* prev;
};

struct dlist
{
    element* head;
    element* tail;
    int liczba_elementow;
};

struct stos
{
    string data;
    stos* next;
};

dlist create_empty_list();
element* create_element(string n_d);
void import_data(string patch, dlist &dl);
void push(stos* &st, string new_data);
void pop(stos* &st);
string import(stos* st);
void add_tail(string n_d, dlist &dl);
void wyswietl_liste(dlist dl);

int main()
{
    dlist dl = create_empty_list();
    import_data("inversed.txt",dl);
    wyswietl_liste(dl);
    system("pause");
    return 0;
}

dlist create_empty_list()
{
    dlist dl;
    dl.head = nullptr;
    dl.tail = nullptr;
    dl.liczba_elementow=0;
    return dl;
}

element* create_element(string n_d)
{
    element* n_e = new element;
    n_e->data=n_d;
    n_e->next=nullptr;
    n_e->prev=nullptr;
    return n_e;
}

void import_data(string patch, dlist &dl)
{
    stos* st = nullptr;
    ifstream file;
    string slowo, zdanie;
    file.open(patch);
    char temp;
    while(file>>slowo)
    {
        while(1)
        {
            if(slowo[slowo.size()-1] == '?' || slowo[slowo.size()-1] == '!' || slowo[slowo.size()-1] == '.')
            {
                temp = slowo[slowo.size()-1];
                slowo.pop_back();
                push(st, slowo);
                break;
            }
            push(st,slowo);
            file>>slowo;
            if(file.eof()) break;
        }

        ostringstream ss;
        while(st!=nullptr)
        {
            ss<<import(st)<<" ";
            pop(st);
        }
        zdanie=ss.str();
        zdanie.pop_back();
        zdanie.push_back(temp);
        ss.str("");
        add_tail(zdanie,dl);
    }
    file.close();
}

void push(stos* &st, string new_data)
{
    stos* dodawany_element=new stos;
    dodawany_element->data=new_data;
    dodawany_element->next=st;
    st=dodawany_element;
}

void pop(stos* &st)
{
    stos* temp = st;
    st=st->next;
    delete temp;
}

string import(stos* st)
{
    string data_to_return=st->data;
    return data_to_return;
}

void add_tail(string n_d, dlist &dl)
{
    element* n_e = create_element(n_d);
    if(dl.liczba_elementow==0)
        dl.head=n_e;
    else
        dl.tail->next=n_e;
    n_e->prev=dl.tail;
    dl.tail=n_e;
    dl.liczba_elementow++;
}

void wyswietl_liste(dlist dl)
{
    element* temp=dl.head;
    do{
        cout<<temp->data<<endl;
        temp=temp->next;
    }while(temp!=nullptr);
}