Provided by: ncurses-doc_6.1+20190803-1ubuntu1_all bug


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

       /* obsolete */
       int vwprintw(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 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 completion.

       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  and  vwprintw  are  equivalent,  to  support  legacy
       applications.  However, the latter (vwprintw) is obsolete:

       ·   The  XSI Curses standard, Issue 4 described 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           marked TO BE WITHDRAWN, and is to be  replaced  by  a  function  vw_printw  using  the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>.

       ·   X/Open Curses, Issue 5 (December 2007) marked vwprintw (along  with  vwscanw  and  the
           termcap interface) as withdrawn.


       ncurses(3NCURSES), addstr(3NCURSES), scanw(3NCURSES), curs_termcap(3X), printf(3),