NAME

std::basic_ostream::put - std::basic_ostream::put

Synopsis

basic_ostream& put( char_type ch );

Behaves as an UnformattedOutputFunction. After constructing and checking the sentry
object, writes the character ch to the output stream.

If the output fails for any reason, sets badbit.

Parameters

ch - character to write

Return value

*this

Notes

This function is not overloaded for the types signed char or unsigned char, unlike
the formatted operator<<

Unlike formatted output functions, this function does not set the failbit if the
output fails.

Example

// Run this code

#include <fstream>
#include <iostream>

int main()
{
std::cout.put('a'); // normal usage
std::cout.put('\n');

std::ofstream s("/does/not/exist/");
s.clear(); // pretend the stream is good
std::cout << "Unformatted output: ";
s.put('c'); // this will set badbit, but not failbit
std::cout << " fail=" << bool(s.rdstate() & s.failbit);
std::cout << " bad=" << s.bad() << '\n';
s.clear();
std::cout << "Formatted output: ";
s << 'c'; // this will set badbit and failbit
std::cout << " fail=" << bool(s.rdstate() & s.failbit);
std::cout << " bad=" << s.bad() << '\n';
}

Output:

a
Unformatted output: fail=0 bad=1
Formatted output: fail=1 bad=1