C++ System Programming Cookbook

How to do it...

In this section, we'll write a program to learn how to put a program to sleep by using the different POSIX APIs that are available. We'll also look at the C++ alternative:

1. Open a shell and create a new file called sleep.cpp. We need to add some headers that we'll need later:

#include <iostream>#include <chrono>#include <thread>    // sleep_for#include <unistd.h>  // for sleep#include <time.h>    // for nanosleep and clock_nanosleep

2. We'll put the program to sleep for 1 second by using the sleep() method and the std::chrono::steady_clock class as time points to calculate the duration at the end:

int main (){    std::cout << "Starting ... " << std::endl;    auto start = std::chrono::steady_clock::now();    sleep (1);    auto end = std::