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  1. #include <iostream>
  2. #include <chrono>
  3. using namespace std;
  4. using namespace std::chrono;
  5.  
  6. size_t MkTimestamp(char *output, size_t size)
  7. {
  8. 	milliseconds ms = duration_cast<milliseconds>(system_clock::now().time_since_epoch());
  9. 	seconds s = duration_cast<seconds>(ms);
  10. 	time_t ctime = (time_t) s.count();
  11. 	tm components;
  12. 	size_t return_value = 0;
  13.  
  14. 	if (!localtime_r(&ctime, &components)) return 0;
  15. 	if ((return_value = strftime(output, size, "%F %T:XXX", &components)) == 0) return 0;
  16.  
  17. 	int ms_d1 = ms.count() / 100 % 10, ms_d2 = ms.count() / 10 % 10, ms_d3 = ms.count() % 10;
  18. 	output[return_value - 3] = ms_d1 + '0';
  19. 	output[return_value - 2] = ms_d2 + '0';
  20. 	output[return_value - 1] = ms_d3 + '0';
  21. 	return return_value;
  22. }
  23.  
  24. int main() {
  25. 	char buffer[64];
  26. 	string timestamp(buffer, MkTimestamp(buffer, sizeof buffer));
  27. 	cout << timestamp << endl;
  28. 	return 0;
  29. }
Success #stdin #stdout 0s 3472KB
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Standard input is empty
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2014-10-09 01:54:05:022
https://ideone.com/ecblE7
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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