sleep in c++ linux

#include <chrono>
#include <thread>

td::this_thread::sleep_for(std::chrono::milliseconds(x));

#include <unistd.h>
 sleep(10);

#include <time.h>

int main(int argc, char const *argv[])
{
    sleep(10);	// wait for 10s

    return 0;
}