C++ Programming Code Examples

Check whether badbit is set. Returns true if the badbit error state flag is set for the stream. The bad() method of ios class in C++ is used to check if the stream is has raised any bad error. It means that this function will check if this stream has its badbit set. This method does not accept any parameter. Function returns true if the stream's badbit error state flag is set. false otherwise. This flag is set by operations performed on the stream when an error occurs while read or writing data, generally causing the loss of integrity of the stream. Notice that this function is not the exact opposite of good, which checks whether none of the error flags (eofbit, failbit and badbit) are set, and not only badbit: iostate value indicates functions to check state flags (member constants) good() eof() fail() bad() rdstate() goodbit No errors (zero value iostate) true false false false goodbit eofbit End-of-File reached on input operation false true false false eofbit failbit Logical error on i/o operation false false true false failbit badbit Read/writing error on i/o operation false false true true badbit eofbit, failbit and badbit are member constants with implementation-defined values that can be combined (as if with the bitwise OR operator). goodbit is zero, indicating that none of the other bits is set. Accesses the stream object. Concurrent access to the same stream object may cause data races. Strong guarantee: if an exception is thrown, there are no changes in the stream.