Section: Miscellaneous Library Functions (3X)
- print formatted output in curses
int printw(const char *fmt, ...);
int wprintw(WINDOW *win, const char *fmt, ...);
int mvprintw(int y, int x, const char *fmt, ...);
int mvwprintw(WINDOW *win, int y, int x, const char *fmt, ...);
int vw_printw(WINDOW *win, const char *fmt, va_list varglist);
/* obsolete */
int vwprintw(WINDOW *win, const char *fmt, va_list varglist);
routines are analogous to printf
effect, the string that would be output by printf
instead as though waddstr
were used on the given window.
The vwprintw and wv_printw routines are analogous
to vprintf [see printf(3)]
and perform a wprintw using a variable argument list.
The third argument is a va_list, a pointer to a
list of arguments, as defined in <stdarg.h>.
Routines that return an integer return ERR
upon failure and OK
(SVr4 only specifies "an integer value other than ERR
") upon successful
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
wmove, and return an error if the position is outside the window,
or if the window pointer is null.
In this implementation, vw_printw
to support legacy applications.
However, the latter (vwprintw
) is obsolete:
.IP • 4
The XSI Curses standard, Issue 4 described these functions.
is marked TO BE WITHDRAWN, and is to be replaced by a function
using the <stdarg.h>
.IP • 4
The Single Unix Specification, Version 2 states that
is preferred to vwprintw
since the latter requires
cannot be used in the same file as <stdarg.h>
This implementation uses <stdarg.h>
because that header is included in <curses.h
.IP • 4
X/Open Curses, Issue 5 (December 2007) marked vwprintw
and the termcap interface) as withdrawn.