UTF8在windows控制台乱码问题

#include <iostream>
#include <codecvt>
std::string convertToUtf8(const std::wstring& str) {
  std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> converter;
  return converter.to_bytes(str);
}
std::wstring convertToUtf16(const std::string& str) {
  std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> converter;
  return converter.from_bytes(str);
}
int main(int argc, char** argv)
{
  std::wstring wstr = L"我是中国人";
  std::string str = convertToUtf8(wstr);
  std::cout << str << std::endl;
  getchar();
  return 0;
}

#include <iostream>
#include <codecvt>
#include <Windows.h>
std::string convertToUtf8(const std::wstring& str) {
  std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> converter;
  return converter.to_bytes(str);
}
std::wstring convertToUtf16(const std::string& str) {
  std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> converter;
  return converter.from_bytes(str);
}
std::wstring Utf8ToUnicode(const std::string& strUTF8)
{
  int len = MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, NULL, 0);
  if (len == 0)
  {
    return L"";
  }
  wchar_t *pRes = new wchar_t[len];
  if (pRes == NULL)
  {
    return L"";
  }
  MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, pRes, len);
  pRes[len - 1] = L'\0';
  std::wstring result = pRes;
  delete[] pRes;
  return result;
}
std::string Utf8ToAnsi(const std::string& utf8)
{
  std::wstring wstrTemp = Utf8ToUnicode(utf8);
  LPCWCH ptr = wstrTemp.c_str();
  int size = WideCharToMultiByte(CP_ACP, 0, ptr, -1, NULL, 0, NULL, NULL);
  std::string strRet(size - 1, 0);
  int len = WideCharToMultiByte(CP_ACP, 0, ptr, -1, (LPSTR)strRet.c_str(), size, NULL, NULL);
  return strRet;
}
int main(int argc, char** argv)
{
  std::wstring wstr = L"我是中国人";
  std::string str = Utf8ToAnsi(convertToUtf8(wstr));
  std::cout << str << std::endl;
  getchar();
  return 0;
}