#include <iostream>
#include <fstream>
#include <string>
#include <pthread.h>
using namespace std;

struct thread_s {
    string str;
    string filename;
    pthread_t thread;
} first, second;

void *writeToFile(void *threadarg)
{
    thread_s *structure = (thread_s *)threadarg;
    ofstream file;
    file.open((structure->filename).c_str(), ios::app);
    file << structure->str << endl;
    file.close();
}

int main(int argc, char const *argv[])
{
    string str;
    ifstream file ("lab4-2.txt");
    first.filename = "first.txt";
    second.filename = "second.txt";
    bool odd = true;
    if (file.is_open())
    {
        while (getline (file, str))
        {
            if (odd)
            {
                first.str = str;
                pthread_create(&first.thread, NULL, writeToFile, (void *)&first);
            }
            else
            {
                second.str = str;
                pthread_create(&second.thread, NULL, writeToFile, (void *)&second);
                pthread_join(first.thread, NULL);
                pthread_join(second.thread, NULL);
            }
            odd = !odd;
        }
        pthread_join(first.thread, NULL);
        file.close();
    }
    else
        cout << "Невозможно открыть файл!" << endl;
    return 0;
}