修正了boost :: posix_time :: ptime的精度

Question

I have problem with boost::posix_time:

Here code:

boost::posix_time::ptime now(boost::posix_time::microsec_clock::local_time());
std::wstringstream record;
record  << now.time_of_day();

record shows: eg. "08:15:30.093750". It is correct. Exactly what I expect. But sometimes I saw strange, eg. "08:15:32" in stead of "08:15:32.000000". How to get "08:15:32.000000"?

Thanks in advance.

Solution:

std::wstringstream record; 
boost::date_time::time_facet<boost::posix_time::ptime, wchar_t>* timeFacet(new boost::date_time::time_facet<boost::posix_time::ptime, wchar_t>(L"%f"));
record.imbue(std::locale(record.getloc(), timeFacet));
record << now.time_of_day();

Answer 1

如果您需要非默认格式，则需要提出要求： http ： //www.boost.org/doc/html/date_time/date_time_io.html

Answer 2

使用小时，分钟和秒访问器并根据需要格式化输出。