clear.3cur

<B>Digital的Unix操作系统VAX 4.2源码</B>

.TH clear 3cur 
.SH Name
clear, wclear \- clear window
.SH Syntax
.PP
.B
#include <cursesX.h>
.PP
.br
.B
int clear(\|)
.PP
.br
.B
int wclear(win)
.br
.B
WINDOW \(**win;
.SH Description
.NXR "clear macro"
.NXR "wclear subroutine"
The
.PN clear
routine 
resets the entire default
window to blanks and sets the current 
.br
(y, x) coordinates to (0, 0).
.PP
The routine 
.PN wclear
resets the entire specified
window to blanks and sets the current 
(y, x) coordinates to (0, 0).
.PP
The
.PN clear
routine
assumes that the screen may have garbage on it that it doesn't know
about. 
The routine first calls
.PN erase 
which copies blanks to every position in the default window,
and then
.PN clearok ,
which clears the physical screen completely on the next call
to
.PN refresh 
for 
.PN stdscr .
.PP
The routine 
.PN clear
is a macro.
.SH Return Values
The
.PN clear
and
.PN wclear
functions return OK on success and ERR on error.
.SH See Also
clearok(3cur), erase(3cur), refresh(3cur)