#include <chrono>
 #include <iostream>
 #include <thread>

 class Sleeper{
   public:
     Sleeper(int& i_):i{i_}{};
     void operator() (int k){
       for (unsigned int j= 0; j <= 5; ++j){
         std::this_thread::sleep_for(std::chrono::milliseconds(100));
         i += k;
       }
       std::cout << std::this_thread::get_id();
     }
   private:
     int& i;
 };


 int main(){

   std::cout << std::endl;

   int valSleeper= 1000;
   std::thread t(Sleeper(valSleeper),5);
   t.detach();
   std::cout << "valSleeper = " << valSleeper << std::endl;

   std::cout << std::endl;

 }