fputc, putc

From cppreference.com
< c | io
Defined in header <stdio.h>
int fputc( int ch, FILE *stream );
int putc( int ch, FILE *stream );

Writes a character ch to the given output stream stream. putc() function may be implemented as a macro.

[edit] Parameters

ch - character to be written
stream - the output stream

[edit] Return value

ch on success, EOF on failure.

[edit] See also

writes a character to stdout
(function)