std::chrono::high_resolution_clock::now(C++11)

#include <iostream>
#include <chrono>

using namespace std::chrono;

int main()
{
  high_resolution_clock::time_point p = high_resolution_clock::now();

  seconds d = duration_cast<seconds>(p.time_since_epoch());
  std::cout << d.count() << std::endl;
}