2) 如果试图做一个无效的操作,例如seeking重定位操作超出了文件尾,则bad()返回true。3) 如果操作不成功,例如打开一个文件流对象失败,或遇到一个无效的输入格式,则fail()返回true。ifstream iFile( filename, ios_base::in ); if ( iFile.fail() ) //不能打开 ...
18.ios::good 1boolgood()const;2booleof()const;3boolfail()const;4boolbad()const; 19.ios::operator! 1booloperator!()const;2//Returns true if either failbit or badbit is set, and false otherwise.3//有错误状态返回 true45intmain () {6std::ifstreamis;7is.open ("test.txt");8if(!is...
If you debug the bad call & drill down into the CRT, you’ll notice that the error case will eventually enter this code in the stdio\_filbuf.cpp: if (!is_buffer_valid_nolock(stream, Character())) { stream.set_flags(stream->_cnt != 0 ? _IOERROR : _IOEOF); stream->...
使用wchar_t类型来表示“宽字符”，但并没有严格规定位宽，而是让wchar_t的宽度由编译器实现，因此不同...
bad 检查是否已发生不可恢复的错误 (std::basic_ios<CharT,Traits>的公开成员函数) operator! 检查是否有错误发生(fail()的同义词) (std::basic_ios<CharT,Traits>的公开成员函数) operator bool 检查是否没有发生错误(!fail()的同义词) (std::basic_ios<CharT,Traits>的公开成员函数) ...
std::basic_ios::bad std::basic_ios::basic_ios std::basic_ios::clear std::basic_ios::copyfmt std::basic_ios::eof std::basic_ios::exceptions std::basic_ios::fail std::basic_ios::fill std::basic_ios::good std::basic_ios::imbue std::basic_ios::init std::basic_ios::move std:...
bad checks if a non-recoverable error has occurred (public member function of std::basic_ios<CharT,Traits>) operator! checks if an error has occurred (synonym of fail()) (public member function of std::basic_ios<CharT,Traits>) operator bool checks if no error has occurred (syn...
bad prüft, ob ein nicht behebbarer Fehler aufgetreten ist Original: checks if a non-recoverable error has occurred The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion of st...
bad vérifie si une erreur irrécupérable s'est produite Original: checks if a non-recoverable error has occurred The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (fonction membre publique de std::basic...