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

You might as well just use the ctype facet's narrow method directly:

#include 
#include 
#include 
#include 

inline std::string narrow(std::wstring const& text)
{
    std::locale const loc("");
    wchar_t const* from = text.c_str();
    std::size_t const len = text.size();
    std::vector buffer(len + 1);
    std::use_facet >(loc).narrow(from, from + len, '_', &buffer[0]);
    return std::string(&buffer[0], &buffer[len]);
}