printw, wprintw, mvprintw, mvwprintw, vwprintw, vw_printw - print
   formatted output in curses windows


   #include <curses.h>

   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 vwprintw(WINDOW *win, const char *fmt, va_list varglist);
   int vw_printw(WINDOW *win, const char *fmt, va_list varglist);


   The printw, wprintw, mvprintw and mvwprintw routines are  analogous  to
   printf  [see printf(3)].  In effect, the string that would be output by
   printf is output instead as though  waddstr  were  used  on  the  given

   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.


   The  XSI  Curses  standard,  Issue  4  describes  these functions.  The
   function vwprintw is marked TO BE WITHDRAWN, and is to be replaced by a
   function  vw_printw  using  the  <stdarg.h> interface.  The Single Unix
   Specification,  Version  2  states  that  vw_printw   is  preferred  to
   vwprintw  since the latter requires including <varargs.h>, which cannot
   be used in the same  file  as  <stdarg.h>.   This  implementation  uses
   <stdarg.h> for both, because that header is included in <curses.h>.


   ncurses(3NCURSES), printf(3), vprintf(3)



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