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FreeBSD man pages : putchar (3)
PUTC(3) 	       FreeBSD Library Functions Manual 	       PUTC(3)

NAME

fputc, putc, putchar, putw - output a character or word to a stream

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <stdio.h> int fputc(int c, FILE *stream); int putc(int c, FILE *stream); int putchar(int c); int putw(int w, FILE *stream);

DESCRIPTION

The fputc() function writes the character c (converted to an ``unsigned char'') to the output stream pointed to by stream. The putc() macro acts essentially identically to fputc(), but is a macro that expands in-line. It may evaluate stream more than once, so argu- ments given to putc() should not be expressions with potential side effects. The putchar() macro is identical to putc() with an output stream of stdout. The putw() function writes the specified int to the named output stream.

RETURN VALUES

The functions, fputc(), putc() and putchar() return the character writ- ten. If an error occurs, the value EOF is returned. The putw() function returns 0 on success; EOF is returned if a write error occurs, or if an attempt is made to write a read-only stream.

SEE ALSO

ferror(3), fopen(3), getc(3), stdio(3)

STANDARDS

The functions fputc(), putc(), and putchar(), conform to ISO/IEC 9899:1990 (``ISO C89''). A function putw() function appeared in Version 6 AT&T UNIX.

BUGS

The size and byte order of an int varies from one machine to another, and putw() is not recommended for portable applications. FreeBSD 4.8 June 4, 1993 FreeBSD 4.8