NAME

       fputc, fputs, putc, putchar, puts - output of characters and strings

SYNOPSIS

       #include <stdio.h>

       int fputc(int c, FILE *stream);

       int fputs(const char *s, FILE *stream);

       int putc(int c, FILE *stream);

       int putchar(int c);

       int puts(const char *s);

DESCRIPTION

       fputc() writes the character c, cast to an unsigned char, to stream.

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

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

       putchar(c) is equivalent to putc(c, stdout).

       puts() writes the string s and a trailing newline to stdout.

       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 unlocked_stdio(3).

RETURN VALUE

       fputc(),  putc(), and putchar() return the character written as an unsigned char cast to an int or EOF on
       error.

       puts() and fputs() return a nonnegative number on success, or EOF on error.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌───────────────────────────┬───────────────┬─────────┐
       │ Interface                 │ Attribute     │ Value   │
       ├───────────────────────────┼───────────────┼─────────┤
       │ fputc(), fputs(), putc(), │ Thread safety │ MT-Safe │
       │ putchar(), puts()         │               │         │
       └───────────────────────────┴───────────────┴─────────┘

CONFORMING TO

       POSIX.1-2001, POSIX.1-2008, C89, C99.

BUGS

       It is not advisable to mix calls to output functions from the  stdio  library  with  low-level  calls  to
       write(2)  for  the  file descriptor associated with the same output stream; the results will be undefined
       and very probably not what you want.

SEE ALSO

       write(2),  ferror(3),  fgets(3),  fopen(3),  fputwc(3),  fputws(3),  fseek(3),  fwrite(3),   putwchar(3),
       scanf(3), unlocked_stdio(3)

COLOPHON

       This  page  is  part  of  release  5.10  of  the  Linux man-pages project.  A description of the project,
       information  about  reporting  bugs,  and  the  latest  version  of  this   page,   can   be   found   at
       https://www.kernel.org/doc/man-pages/.

GNU                                                2020-12-21                                            PUTS(3)