c++ - 如何将 boost::date_time::date::day_of_week() 转换为字符串类型？

Question

这是我想做的。

ptime now = second_clock::local_time();
date today = now.date();
today.day_of_week();
string day = "Sat";
if(day == to_string(today.day_of_week()))
{
   //perform an action
}
else
{
   //perform another action
}

代码可以编译，但程序永远不会执行 if block 。我还能如何将 day_of_week() 转换为字符串？

Answer 1

我建议 boost::lexical_cast<>这里:

std::string day = boost::lexical_cast<std::string>(today.day_of_week());

或者简单地说:

std::cout << today.day_of_week();

Live On C++ Shell

#include <boost/date_time/posix_time/posix_time_io.hpp>
#include <boost/date_time/posix_time/posix_time.hpp>
#include <boost/lexical_cast.hpp>

int main() {
    auto now = boost::posix_time::second_clock::local_time();
    auto today = now.date();

    std::string day = boost::lexical_cast<std::string>(today.day_of_week());
    std::cout << today.day_of_week();
}

打印

Fri