Handle In/Output file

// Source: https://cppcodetips.wordpress.com/2014/09/16/reading-and-writing-a-unicode-file-in-c/

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <tchar.h>
using namespace std;


std::wstring readUnicodeFile(const char* filename)
{
    std::ifstream wif(filename);
    std::stringstream wss;
    wss << wif.rdbuf();
    std::string  const &str = wss.str();
    std::wstring wstr;
    wstr.resize(str.size() / sizeof(wchar_t));
    std::memcpy(&wstr[0], str.c_str(), str.size()); // copy data into wstring
    return wstr;
}

void WriteUnicodetoFile(const char* myFile, wstring& ws) {
    std::ofstream outFile(myFile, std::ios::out | std::ios::binary);
    outFile.write((char *)ws.c_str(), ws.length() * sizeof(wchar_t));
    outFile.close();

}

int main(int argc, _TCHAR* argv[])
{
    wstring sText = readUnicodeFile("inputUnicode.txt");
    WriteUnicodetoFile("ouputUnicode.txt", sText);
}