1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" Chris Torek and the American National Standards Committee X3, 6.\" on Information Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors. 20.\" 4. Neither the name of the University nor the names of its contributors 21.\" may be used to endorse or promote products derived from this software 22.\" without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)putc.3 8.1 (Berkeley) 6/4/93 37.\" 38.Dd June 4, 1993 39.Dt PUTC 3 40.Os 41.Sh NAME 42.Nm fputc , 43.Nm putc , 44.Nm putchar , 45.Nm putw 46.Nd output a character or word to a stream 47.Sh SYNOPSIS 48.Fd #include <stdio.h> 49.Ft int 50.Fn fputc "int c" "FILE *stream" 51.Ft int 52.Fn putc "int c" "FILE *stream" 53.Ft int 54.Fn putchar "int c" 55.Ft int 56.Fn putw "int w" "FILE *stream" 57.Sh DESCRIPTION 58The 59.Fn fputc 60function 61writes the character 62.Fa c 63(converted to an ``unsigned char'') 64to the output stream pointed to by 65.Fa stream . 66.Pp 67.Fn Putc 68acts essentially identically to 69.Fn fputc , 70but is a macro that expands in-line. It may evaluate 71.Fa stream 72more than once, so arguments given to 73.Fn putc 74should not be expressions with potential side effects. 75.Pp 76.Fn Putchar 77is identical to 78.Fn putc 79with an output stream of 80.Em stdout . 81.Pp 82The 83.Fn putw 84function 85writes the specified 86.Em int 87to the named output 88.Fa stream . 89.Sh RETURN VALUES 90The functions, 91.Fn fputc , 92.Fn putc 93and 94.Fn putchar 95return the character written. 96If an error occurs, the value 97.Dv EOF 98is returned. 99The 100.Fn putw 101function 102returns 0 on success; 103.Dv EOF 104is returned if 105a write error occurs, 106or if an attempt is made to write a read-only stream. 107.Sh SEE ALSO 108.Xr ferror 3 , 109.Xr fopen 3 , 110.Xr getc 3 , 111.Xr stdio 3 112.Sh STANDARDS 113The functions 114.Fn fputc , 115.Fn putc , 116and 117.Fn putchar , 118conform to 119.St -ansiC . 120A function 121.Fn putw 122function appeared in 123.At v6 . 124.Sh BUGS 125The size and byte order of an 126.Em int 127varies from one machine to another, and 128.Fn putw 129is not recommended for portable applications. 130