< cpp‎ | io‎ | basic ios
void setstate( iostate state );

Sets the stream error flags state in addition to currently set flags. Essentially calls clear(rdstate() | state). May throw an exception.


[edit] Parameters

state - stream error state flags to set. It can be a combination of the following constants:
Constant Explanation
goodbit no error
badbit irrecoverable stream error
failbit input/output operation failed (formatting or extraction error)
eofbit associated input sequence has reached end-of-file

[edit] Return value


[edit] Example

#include <iostream>
#include <sstream>
int main()
    std::ostringstream stream;
    if (! {
        std::cout << "stream is not fail\n";
    if ( {
        std::cout << "now stream is fail\n";
    if (!stream.good()) {
        std::cout << "and stream is not good\n";


stream is not fail
now stream is fail
and stream is not good

[edit] See also

returns state flags
(public member function)
clears error and eof flags
(public member function)