NAME

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

SYNOPSIS

       #include <stdio.h>

       int fputc(int c, FILE *stream);
       int putc(int c, FILE *stream);
       int putchar(int c);

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

DESCRIPTION

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

       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).

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

       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(), putchar(), puts()                    │ Thread safety │ MT-Safe │
       └───────────────────────────────────────────────────────────────┴───────────────┴─────────┘

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 5.13 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/.