Pause program execution for 5 seconds in c++

Question

I want to pause the execution of c++ program for 5 seconds. In android Handler.postDelayed has the required functionality what I am looking for. Is there anything similar to that in c++?

Answer 1

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

int main()
{
    std::cout << "Hello waiter" << std::endl;
    std::chrono::seconds dura( 5);
    std::this_thread::sleep_for( dura );
    std::cout << "Waited 5s\n";
}

this_thread::sleep_for Blocks the execution of the current thread for at least the specified sleep_duration.

Answer 2

You can do this on the pure C level, because C api calls are usable also from C++. It eliminiates the problem if you actual c++ library didn't contained the needed std:chrono or std::this_thread (they differ a little bit).

The C api of most OSes contains some like a sleeping function, although it can be also different. For example, on posixen, there is the sleep() API call in the standard C library, and you can use this from C++ as well:

#include <unistd.h>

int main() {
   sleep(5);
   return;
}

Or you can use usleep() is you want a better precision as seconds. usleep() can sleep for microsecond precision.

On windows, you can use the Sleep(int usec) call, which is with big 'S', and uses milliseconds.