使用from_string和boost日期 [英] using from_string with boost date
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问题描述
我有以下代码:
#include <iostream>
#include <string>
#include <iomanip>
#include <locale>
#include <boost/date_time/gregorian/gregorian.hpp>
#include <boost/date_time/gregorian/parsers.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/date_time/posix_time/posix_time_io.hpp>
using namespace boost::posix_time;
using namespace boost::gregorian;
int main(int argc, char *argv[])
{
std::string ds("2011-01-02");
date dt(from_string(ds));
date_facet *f=new date_facet("%Y-%m-%d");
std::locale loc=std::locale(std::locale::classic(),f);
std::cout.imbue(loc);
std::cout<<dt<<std::endl;
return 0;
}
并且当我编译它,我得到以下错误:
and when I compile it, I get the following error:
/tmp/ccBWTFcx.o: In function `unsigned short boost::date_time::month_str_to_ushort<boost::gregorian::greg_month>(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)':
b.cpp:(.text._ZN5boost9date_time19month_str_to_ushortINS_9gregorian10greg_monthEEEtRKSs[unsigned short boost::date_time::month_str_to_ushort<boost::gregorian::greg_month>(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&)]+0x97): undefined reference to `boost::gregorian::greg_month::get_month_map_ptr()'
collect2: ld returned 1 exit status
$ b b
这是一个库链接问题?
is this a library link issue?
推荐答案
Boost date_time不是标题,命令行,例如:
Boost date_time isn't header only, you need to link it on the command line, for example:
gcc myprogram.cpp -omyprogram -lboost_date_time
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