fputc, fputs, putc, putchar, puts − output of characters and


     , FILE *int fputc(int c

     , FILE *int fputs(const char *s

     , FILE *int putc(int c

     );int putchar(int c

     );int puts(const char *s

writes the character cast to an to

     writes the string s to without its terminating null
byte ('\0').

     is equivalent to except that it may be implemented as a
macro which evaluates stream more than once.

     )putchar(c is equivalent to , putc(c

     writes the string s and a trailing newline to

     Calls to the functions described here can be mixed with
each other and with calls to other output functions from the
stdio library for the same output stream.

     For nonlocking counterparts, see

and return the character written as an unsignedchar cast to
an int or EOF on error.

     and return a nonnegative number on success, or EOF on

For an explanation of the terms used in this section, see

│Interface                 Attribute     Value   │
│                          │ Thread safety MT‐Safe │

POSIX.1‐2001, POSIX.1‐2008, C89, C99.

It is not advisable to mix calls to output functions from
the stdio library with low‐level calls to for the file
descriptor associated with the same output stream; the
results will be undefined and very probably not what you



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