PUTC(3)PUTC(3)NAME
putc, putchar, fputc, putw - put character or word on a stream
SYNOPSIS
#include <stdio.h>
int putc(c, stream)
char c;
FILE *stream;
int putchar(c)
int fputc(c, stream)
FILE *stream;
int putw(w, stream)
FILE *stream;
DESCRIPTION
Putc appends the character c to the named output stream. It returns
the character written.
Putchar(c) is defined as putc(c, stdout).
Fputc behaves like putc, but is a genuine function rather than a macro.
Putw appends word (that is, int) w to the output stream. It returns
the word written. Putw neither assumes nor causes special alignment in
the file.
SEE ALSOfopen(3), fclose(3), getc(3), puts(3), printf(3), fread(3)DIAGNOSTICS
These functions return the constant EOF upon error. Since this is a
good integer, ferror(3) should be used to detect putw errors.
BUGS
Because it is implemented as a macro, putc treats a stream argument
with side effects improperly. In particular
putc(c, *f++);
doesn't work sensibly.
Errors can occur long after the call to putc.
7th Edition April 1, 1989 PUTC(3)