#include 
     
      std::string ws2s(const std::wstring& ws){    std::string curLocale = setlocale(LC_ALL, NULL);        // curLocale = "C";    setlocale(LC_ALL, "chs");    const wchar_t* _Source = ws.c_str();    size_t _Dsize = 2 * ws.size() + 1;    char *_Dest = new char[_Dsize];    memset(_Dest,0,_Dsize);    wcstombs(_Dest,_Source,_Dsize);    std::string result = _Dest;    delete []_Dest;    setlocale(LC_ALL, curLocale.c_str());    return result;}std::wstring s2ws(const std::string& s){    setlocale(LC_ALL, "chs");     const char* _Source = s.c_str();    size_t _Dsize = s.size() + 1;    wchar_t *_Dest = new wchar_t[_Dsize];    wmemset(_Dest, 0, _Dsize);    mbstowcs(_Dest,_Source,_Dsize);    std::wstring result = _Dest;    delete []_Dest;    setlocale(LC_ALL, "C");    return result;}
     

 

BOOL StringToWString(const std::string &str,std::wstring &wstr) {         int nLen = (int)str.length();         wstr.resize(nLen,L' ');      int nResult = MultiByteToWideChar(CP_ACP,0,(LPCSTR)str.c_str(),nLen,(LPWSTR)wstr.c_str(),nLen);      if (nResult == 0)     {         return FALSE;     }      return TRUE; } //wstring高字节不为0，返回FALSE BOOL WStringToString(const std::wstring &wstr,std::string &str) {         int nLen = (int)wstr.length();         str.resize(nLen,' ');      int nResult = WideCharToMultiByte(CP_ACP,0,(LPCWSTR)wstr.c_str(),nLen,(LPSTR)str.c_str(),nLen,NULL,NULL);      if (nResult == 0)     {         return FALSE;     }      return TRUE; }

 

std::wstring StringToWString(const std::string &str) {     std::wstring wstr(str.length(),L' ');     std::copy(str.begin(), str.end(), wstr.begin());     return wstr;  }  //只拷贝低字节至string中 std::string WStringToString(const std::wstring &wstr) {     std::string str(wstr.length(), ' ');     std::copy(wstr.begin(), wstr.end(), str.begin());     return str;  }