| ios::operator! |
public member function |
bool operator ! ( ) const; |
|
Evaluate stream object
Returns true if either one of the error flags (failbit or badbit) is set on the stream. Otherwise it returns false.
This behavior is equivalent to the member function fail().
Parameters
none
Return Value
true if either
failbit or
badbit is set.
false otherwise.
Example
// evaluating a stream object
#include <iostream>
#include <fstream>
using namespace std;
int main () {
ifstream is;
is.open ("test.txt");
if (!is)
cerr << "Error opening 'test.txt'\n";
return 0;
}
|
Basic template member declaration
(
basic_ios<charT,traits> )
bool operator ! () const;
|
See also
| ios::fail | Check if either failbit or badbit is set (public member function) |
| ios::good | Check if the state of the stream is good for i/o operations. (public member function) |
