file.open(filename, ifstream::in | ifstream::app);
85 51 C:\Users\86186\Documents\tencent files\2120733640\filerecv\mobilefile\stumangement(1).cpp [Error] no matching function for call to 'std::basic_fstream::open(std::string&, std::_Ios_Openmode)'
file.open(filename, ifstream::out );
100 37 C:\Users\86186\Documents\tencent files\2120733640\filerecv\mobilefile\stumangement(1).cpp [Error] no matching function for call to 'std::basic_fstream::open(std::string&, const openmode&)'