•  将毫秒转换为时分秒毫秒表示

using namespace std;using namespace std::chrono;milliseconds ms(7255042);// split into hours, minutes, seconds, and millisecondshours   hh         = duration_cast
     
      (ms);minutes mm     　  = duration_cast
      
       (ms % chrono::hours(1));seconds ss         = duration_cast
       
        (ms % chrono::minutes(1));milliseconds msec  = duration_cast
        
         (ms % chrono::seconds(1));// and print durations and values:cout << "raw: " << hh << "::" << mm << "::"                << ss << "::" << msec << endl;cout << "     " << setfill(’0’) << setw(2) << hh.count() << "::"                                << setw(2) << mm.count() << "::"                                << setw(2) << ss.count() << "::"                                << setw(3) << msec.count() << endl;
        
       
      
     

raw: [2 of 3600/1]::[0 of 60/1]::[55 of 1/1]::[42 of 1/1000] 02::00::55::042