NAME

std::basic_ios::setstate - std::basic_ios::setstate

Synopsis

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.

Parameters

stream error state flags to set. It can be a combination of the following
constants:

state - 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

Return value

(none)

Example

// Run this code

#include <iostream>
#include <sstream>

int main()
{
std::ostringstream stream;

if (!stream.fail()) {
std::cout << "stream is not fail\n";
}

stream.setstate(std::ios_base::failbit);

if (stream.fail()) {
std::cout << "now stream is fail\n";
}

if (!stream.good()) {
std::cout << "and stream is not good\n";
}
}

Output: