=====bad=====
Syntax:

<code>
    bool stream::bad();
</code>
The bad() function returns true if a fatal error with the current stream has
occurred, false otherwise.

Note: fatal errors do not normally occur. Even a failure to open a file is not a fatal error.

Related Topics: [[clear]], [[eof]], [[exceptions]], [[fail]], [[good]], [[rdstate]] 

Stream states:
  *if (s): The previous operation was successful (a shorthand for !s.fail()).
  *if (s.fail()): The previous operation failed.
  *if (s.eof()): Reading past the end has been attempted.
  *if (s.bad()): Stream state is undefined; the stream can no longer be used.
  *if (s.good()): None of bad/eof/fail are set.