#include <random>
#include <iostream>
#include <set>
#include <fstream>
#include <stdlib.h>
#include <ctime>
#include <conio.h>
#include <iomanip>

using namespace std;
int main()
{
    std::random_device rd;
    std::mt19937 gen(rd());
    std::uniform_int_distribution<> dist(100000, 99999999);

    std::set<int> random_numbers;

    size_t how_many = 10;
    while (random_numbers.size() < how_many)
        random_numbers.emplace(dist(gen));

    std::set<int>::iterator it;
    fstream plik( "plik.txt", ios::app );
    for (it = random_numbers.begin(); it != random_numbers.end(); ++it)
    {
    if( plik.good() )
    {
        int a = *it;
        plik<<a<<endl;
        
        

   }
    std::cout << *it << '\n';
    }
    
    
plik.close();
}