How to convert wstring into string?

Question

The question is how to convert wstring to string?

I have next example :

#include 
#include 

int main()
{
    std::wstr         


        

Answer 1

#include 
namespace lcv = boost::locale::conv;

inline std::wstring fromUTF8(const std::string& s)
{ return lcv::utf_to_utf(s); }

inline std::string toUTF8(const std::wstring& ws)
{ return lcv::utf_to_utf(ws); }