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Showing content from https://en.cppreference.com/w/cpp/algorithm/../io/basic_istream/../basic_ios/setstate.html below:

std::basic_ios<CharT,Traits>::setstate - cppreference.com

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

(none)

[edit] Example

Output:

stream is not fail
now stream is fail
and stream is not good
[edit] See also

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