双字节字符与单字节字符转换

std::string wstring2string(const std::wstring& wstr)
{
    int bufLen = WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,NULL,0,NULL,NULL);
    char* strbuf = new char[bufLen];
    WideCharToMultiByte(CP_UTF8,0,wstr.c_str(),-1,strbuf,bufLen,NULL,NULL);
    std::string temp(strbuf);
    delete[] strbuf;

    return temp;
}

std::wstring string2wstring(const std::string& str)
{
    int bufLen = MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,NULL,0);
    wchar_t* wstrbuf = new wchar_t[bufLen];
    MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,wstrbuf,bufLen);
    std::wstring temp(wstrbuf);
    delete[] wstrbuf;

    return temp;
}

注意这里使用的是CP_UTF8 而不是 CP_ACP