#include <iostream>
#include <ostream>
#include <chrono> // for all things time
#include <future> // for std::async, that allows us to run functions on other threads
void function()
{
const std::size_t max_loop_count{ 500 };
std::atomic<std::size_t> n{ 0ul }; // make access to loopcounter threadsafe
// start another thread that will do the reporting independent of the
// actual work you are doing in your loop.
// for this capture n (loop counter) by reference (so this thread can look at it)
auto future = std::async(std::launch::async,[&n, max_loop_count]
{
while (n < max_loop_count)
{
std::this_thread::sleep_for(std::chrono::milliseconds(100));
std::cout << "\rprogress = " << (100 * n) / max_loop_count << "%";
std::flush(std::cout);
}
});
for (; n < max_loop_count; n++)
{
// do your loops work
std::this_thread::sleep_for(std::chrono::milliseconds(10));
}
// synchronize with reporting thread
future.get();
}
int main()
{
function();
return 0;
}
