Sets the clear flag for the window.

    Format

      #include  <curses.h>

      clearok  (WINDOW *win, bool boolf);

1 - Arguments

 win

    The entire size of the terminal screen. You can use the windows
    stdscr and curscr with clearok.

 boolf

    A Boolean value of TRUE or FALSE. If the argument is TRUE, this
    forces a clearscreen to be printed on the next call to refresh,
    or stops the screen from being cleared if boolf is FALSE.

    The type bool is defined in the <curses.h> header file as
    follows:

    #define bool int

2 - Description

    Unlike the clear function, the clearok function does not alter
    the contents of the window. If the win argument is curscr, the
    next call to refresh causes a clearscreen, even if the window
    passed to refresh is not a window the size of the entire terminal
    screen.