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rdstate

#include <iostream.h>int rdstate() const;

The rdstate( ) function is a member of ios.

The rdstate( ) function returns the status of the associated stream. The C++ I/O system maintains status information about the outcome of each I/O operation relative to each active stream. The current state of the I/O system is held in an integer, in which the following flags are encoded:

Name	Meaning
ios::goodbit	No errors occurred.
ios::eofbit	End of file is encountered.
ios::failbit	A nonfatal I/O error has occurred.
ios::badbit	A fatal I/O error has occurred.

These flags are enumerated inside ios.

rdstate( ) returns zero (ios::goodbit) when no error has occurred; otherwise, an error bit has been set.

Related functions are eof( ), good( ), bad( ), clear( ), and fail( ).