formatting to wstring simpler way of doing it

Question

I need to format a double. I use the code bellow

wstring to_wstring1(double f){
  wchar_t wc[0x40];swprintf(wc,countof(wc),L"%E",f);return wstring(wc);
}

Is there a way to do it that avoids using the buffer wc? I am thinking to allocate a wstring with the size of the buffer and write there and after resize the string up to the final 0. Is there a simpler way?

Answer 1

You can use std::to_wstring(double).

Note: It does require C++11

Answer 2

Something like this?

#include <iostream>
#include <sstream>

int main() {
    std::wostringstream w;
    w << 1.0;;
    std::wcout << w.str() << std::endl;
}

Note: It does not require C++11