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 4.15 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/.