Perform a printf in the specified window, starting at the current
    position of the cursor. The printw function acts on the stdscr
    window.

    Format

      #include  <curses.h>

      printw  (char *format_spec, . . . );

      int wprintw  (WINDOW *win, char *format_spec, . . . );

1 - Arguments

 win

    A pointer to the window.

 format_spec

    A pointer to the format specification string.

  . . .

    Optional expressions whose resultant types correspond to
    conversion specifications given in the format specification.

    If no conversion specifications are given, you may omit the
    output sources. Otherwise, the function call must have exactly
    as many output sources as there are conversion specifications,
    and the conversion specifications must match the types of the
    output sources.

    Conversion specifications are matched to output sources in left-
    to-right order. Excess output pointers, if any, are ignored.

2 - Description

    The formatting specification (format_spec) and the other
    arguments are identical to those used with the printf function.

    The printw and wprintw functions format and then print the
    resultant string to the window using the addstr function. For
    more information, see the printf and scrollok functions in this
    section.

3 - Return Values

    OK                 Indicates success.
    ERR                Indicates that the function makes the window
                       scroll illegally.