Windows CMD不能正确输出UTF-16

我试图输出非ascii字符到Windows CMD，但问题是，它不工作。我没有写下面的代码，我把这两部分粘在一起。该代码应该将字符转换为UTF-8，然后从UTF-8转换为UTF-16，以便在Windows上正确显示。下面是代码:

// codecvt::in example
#include <iostream>       // std::wcout, std::wcout
#include <locale>         // std::locale, std::codecvt, std::use_facet
#include <string>         // std::wstring
#include <cwchar>         // std::mbstate_t
void GetUnicodeChar(unsigned int code, char chars[5]) {
        if (code <= 0x7F) {
            chars[0] = (code & 0x7F); chars[1] = '';
        } else if (code <= 0x7FF) {
            // one continuation byte
            chars[1] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[0] = 0xC0 | (code & 0x1F); chars[2] = '';
        } else if (code <= 0xFFFF) {
            // two continuation bytes
            chars[2] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[1] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[0] = 0xE0 | (code & 0xF); chars[3] = '';
        } else if (code <= 0x10FFFF) {
            // three continuation bytes
            chars[3] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[2] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[1] = 0x80 | (code & 0x3F); code = (code >> 6);
            chars[0] = 0xF0 | (code & 0x7); chars[4] = '';
        } else {
            // unicode replacement character
            chars[2] = 0xEF; chars[1] = 0xBF; chars[0] = 0xBD;
            chars[3] = '';
        }
    }
int main ()
{
  typedef std::codecvt<wchar_t,char,std::mbstate_t> facet_type;
  std::locale mylocale;
  const facet_type& myfacet = std::use_facet<facet_type>(mylocale);
  char mystr[5];
  GetUnicodeChar(225, mystr);
  // prepare objects to be filled by codecvt::in :
  wchar_t pwstr[sizeof(mystr)];              // the destination buffer (might be too short)
  std::mbstate_t mystate = std::mbstate_t(); // the shift state object
  const char* pc;                            // from_next
  wchar_t* pwc;                              // to_next
  // translate characters:
  facet_type::result myresult = myfacet.in (mystate,
      mystr, mystr+sizeof(mystr), pc,
      pwstr, pwstr+sizeof(mystr), pwc);
  if ( myresult == facet_type::ok )
  {
    std::wcout << L"Translation successful: ";
    std::wcout << pwstr << std::endl;
  }
  return 0;
}

问题是，当我向GetUnicodeChar函数提供数字225 (unicode字符á的十进制表示)时，OSX上的输出是正确的，因为它显示字母á，但在Windows上它显示字符á。但我认为Windows内部使用UTF-16，这就是为什么我认为这应该工作。