获取当前系统本地时间，精确到毫秒

 1 #include <sys/timeb.h>
 2 #include <chrono>
 3 
 4 char* cur_time_c(char strDateTime[32])
 5 {
 6     struct timeb tp_cur;
 7     ftime(&tp_cur);
 8 
 9     struct tm btm;
10 
11 #ifdef WIN32
12     localtime_s(&btm, &tp_cur.time);
13 #else
14     localtime_r(&tp_cur.time, &btm);
15 #endif
16 
17     sprintf(strDateTime, "%04d-%02d-%02d %02d:%02d:%02d.%03d", 
18         btm.tm_year + 1900, btm.tm_mon + 1, btm.tm_mday,
19         btm.tm_hour, btm.tm_min, btm.tm_sec, tp_cur.millitm);
20 
21     return strDateTime;
22 }
23 
24 
25 char* cur_time_cpp11(char strDateTime[32])
26 {
27     static const std::chrono::hours = EIGHT_HOURS(8);
28 
29     auto nowLocalTimeCount 
30         = std::chrono::system_clock::now().time_since_epoch()
31         + EIGHT_HOURS;
32 
33     std::chrono::hours now_h
34         = std::chrono::duration_cast<std::chrono::hours>(nowLocalTimeCount);
35     std::chrono::minutes now_m
36         = std::chrono::duration_cast<std::chrono::minutes>(nowLocalTimeCount);
37     std::chrono::seconds now_s
38         = std::chrono::duration_cast<std::chrono::seconds>(nowLocalTimeCount);
39     std::chrono::milliseconds now_ms
40         = std::chrono::duration_cast<std::chrono::milliseconds>(nowLocalTimeCount);
41 
42     sprintf(strDateTime, "%02d:%02d:%02d.%03d", 
43         now_h % 24, now_m % 60, now_s % 60, now_ms % 1000);
44 
45     return strDateTime;
46 }