【C++】UTF8转GBK

string UTF8ToGBK(const std::string& strUTF8)
{
	int len = MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, NULL, 0);
	TCHAR * wszGBK = new TCHAR[len + 1];
	memset(wszGBK, 0, len * 2 + 2);
	MultiByteToWideChar(CP_UTF8, 0, strUTF8.c_str(), -1, wszGBK, len);

	len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
	char *szGBK = new char[len + 1];
	memset(szGBK, 0, len + 1);
	WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, szGBK, len, NULL, NULL);
	std::string strTemp(szGBK);
	delete[]szGBK;
	delete[]wszGBK;
	return strTemp;
}