std::basic_ostream::put - cppreference.com

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# std::basic_ostream::put

From cppreference.com
< cpp‎ | io‎ | basic ostream

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`.

### [edit] Parameters

ch | - | character to write

### [edit] Return value

*this

### [edit] 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.

### [edit] 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

### [edit] See also

operator<<(std::basic_ostream) | inserts character data (function) [edit]
write | inserts blocks of characters (public member function) [edit]

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