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putc(3)


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 4.09 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/.



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