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<H1 class="no-header">curs_printw 3x</H1>
<PRE>
<STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG> <STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>
</PRE><H2><a name="h2-NAME">NAME</a></H2><PRE>
<STRONG>printw</STRONG>, <STRONG>wprintw</STRONG>, <STRONG>mvprintw</STRONG>, <STRONG>mvwprintw</STRONG>, <STRONG>vwprintw</STRONG>, <STRONG>vw_printw</STRONG> - print
formatted output in <STRONG>curses</STRONG> windows
</PRE><H2><a name="h2-SYNOPSIS">SYNOPSIS</a></H2><PRE>
<STRONG>#include</STRONG> <STRONG><curses.h></STRONG>
<STRONG>int</STRONG> <STRONG>printw(const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>wprintw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>mvprintw(int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>mvwprintw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>y</EM><STRONG>,</STRONG> <STRONG>int</STRONG> <EM>x</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>...);</STRONG>
<STRONG>int</STRONG> <STRONG>vw_printw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>va_list</STRONG> <EM>varglist</EM><STRONG>);</STRONG>
/* obsolete */
<STRONG>int</STRONG> <STRONG>vwprintw(WINDOW</STRONG> <STRONG>*</STRONG><EM>win</EM><STRONG>,</STRONG> <STRONG>const</STRONG> <STRONG>char</STRONG> <STRONG>*</STRONG><EM>fmt</EM><STRONG>,</STRONG> <STRONG>va_list</STRONG> <EM>varglist</EM><STRONG>);</STRONG>
</PRE><H2><a name="h2-DESCRIPTION">DESCRIPTION</a></H2><PRE>
The <STRONG>printw</STRONG>, <STRONG>wprintw</STRONG>, <STRONG>mvprintw</STRONG> and <STRONG>mvwprintw</STRONG> routines are analogous to
<STRONG>printf</STRONG> [see <STRONG>printf(3)</STRONG>]. In effect, the string that would be output by
<STRONG>printf</STRONG> is output instead as though <STRONG>waddstr</STRONG> were used on the given win-
dow.
The <STRONG>vwprintw</STRONG> and <STRONG>vw_printw</STRONG> routines are analogous to <STRONG>vprintf</STRONG> [see
<STRONG>printf(3)</STRONG>] and perform a <STRONG>wprintw</STRONG> using a variable argument list. The
third argument is a <STRONG>va_list</STRONG>, a pointer to a list of arguments, as de-
fined in <STRONG><stdarg.h></STRONG>.
</PRE><H2><a name="h2-RETURN-VALUE">RETURN VALUE</a></H2><PRE>
Routines that return an integer return <STRONG>ERR</STRONG> upon failure and <STRONG>OK</STRONG> (SVr4
only specifies "an integer value other than <STRONG>ERR</STRONG>") upon successful com-
pletion.
X/Open defines no error conditions. In this implementation, an error
may be returned if it cannot allocate enough memory for the buffer used
to format the results. It will return an error if the window pointer
is null.
Functions with a "mv" prefix first perform a cursor movement using
<STRONG>wmove</STRONG>, and return an error if the position is outside the window, or if
the window pointer is null.
</PRE><H2><a name="h2-HISTORY">HISTORY</a></H2><PRE>
While <STRONG>printw</STRONG> was implemented in 4BSD, it was unused until 4.2BSD (which
used it in games). That early version of curses was before the ANSI C
standard. It did not use <varargs.h>, though that was available. In
1991 (a couple of years after SVr4 was generally available, and after
the C standard was published), other developers updated the library,
using <stdarg.h> internally in 4.4BSD curses. Even with this improve-
ment, BSD curses did not use function prototypes (or even declare func-
tions) in the <curses.h> header until 1992.
SVr2 documented <STRONG>printw</STRONG>, <STRONG>wprintw</STRONG> tersely as "printf on <EM>stdscr</EM>" and
tersely as "printf on <EM>win</EM>", respectively.
SVr3 added <STRONG>mvprintw</STRONG>, and <STRONG>mvwprintw</STRONG>, with a three-line summary saying
that they were analogous to <STRONG>printf(3)</STRONG>, explaining that the string which
would be output from <STRONG>printf(3)</STRONG> would instead be output using <STRONG>waddstr</STRONG> on
the given window. SVr3 also added <STRONG>vwprintw</STRONG>, saying that the third pa-
rameter is a <STRONG>va_list</STRONG>, defined in <varargs.h>, and referring the reader
to the manual pages for <EM>varargs</EM> and <EM>vprintf</EM> for detailed descriptions.
SVr4 added no new variations of <STRONG>printw</STRONG>, but provided for using
<varargs.h> or <stdarg.h> to define the <STRONG>va_list</STRONG> type.
X/Open Curses added <STRONG>vw_printw</STRONG> to replace <STRONG>vwprintw</STRONG>, stating that its
<STRONG>va_list</STRONG> definition requires <stdarg.h>.
</PRE><H2><a name="h2-PORTABILITY">PORTABILITY</a></H2><PRE>
In this implementation, <STRONG>vw_printw</STRONG> and <STRONG>vwprintw</STRONG> are equivalent, to sup-
port legacy applications. However, the latter (<STRONG>vwprintw</STRONG>) is obsolete:
<STRONG>o</STRONG> The XSI Curses standard, Issue 4 described these functions. The
function <STRONG>vwprintw</STRONG> is marked TO BE WITHDRAWN, and is to be replaced
by a function <STRONG>vw_printw</STRONG> using the <STRONG><stdarg.h></STRONG> interface.
<STRONG>o</STRONG> The Single Unix Specification, Version 2 states that <STRONG>vw_printw</STRONG> is
preferred to <STRONG>vwprintw</STRONG> since the latter requires including
<STRONG><varargs.h></STRONG>, which cannot be used in the same file as <STRONG><stdarg.h></STRONG>.
This implementation uses <STRONG><stdarg.h></STRONG> for both, because that header
is included in <STRONG><curses.h</STRONG>>.
<STRONG>o</STRONG> X/Open Curses, Issue 5 (December 2007) marked <STRONG>vwprintw</STRONG> (along with
<STRONG>vwscanw</STRONG> and the termcap interface) as withdrawn.
</PRE><H2><a name="h2-SEE-ALSO">SEE ALSO</a></H2><PRE>
<STRONG><A HREF="ncurses.3x.html">curses(3x)</A></STRONG>, <STRONG><A HREF="curs_addstr.3x.html">curs_addstr(3x)</A></STRONG>, <STRONG><A HREF="curs_scanw.3x.html">curs_scanw(3x)</A></STRONG>, <STRONG><A HREF="curs_termcap.3x.html">curs_termcap(3x)</A></STRONG>,
<STRONG>printf(3)</STRONG>, <STRONG>vprintf(3)</STRONG>.
<STRONG><A HREF="curs_printw.3x.html">curs_printw(3x)</A></STRONG>
</PRE>
<div class="nav">
<ul>
<li><a href="#h2-NAME">NAME</a></li>
<li><a href="#h2-SYNOPSIS">SYNOPSIS</a></li>
<li><a href="#h2-DESCRIPTION">DESCRIPTION</a></li>
<li><a href="#h2-RETURN-VALUE">RETURN VALUE</a></li>
<li><a href="#h2-HISTORY">HISTORY</a></li>
<li><a href="#h2-PORTABILITY">PORTABILITY</a></li>
<li><a href="#h2-SEE-ALSO">SEE ALSO</a></li>
</ul>
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