我想获取自午夜以来的秒数。这是我的第一个猜测:time_tcurrent;time(¤t);structtmdateDetails;ACE_OS::localtime_r(¤t,&dateDetails);//Getthecurrentsessionstarttimeconsttime_tyearToTime=dateDetails.tm_year-70;//yearto1900convertedintoyearto1970consttime_tydayToTime=dateDetails.tm_yday;consttime_tmidnightTime=(yea