[C] Is there a way to clean half screen? Post: 302508522

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Top Forums Programming [C] Is there a way to clean half screen? Post 302508522 by Corona688 on Monday 28th of March 2011 11:23:52 AM

03-28-2011

Registered User

It's not "depreciated" -- C never had it. I don't think Windows ever had it, either. Certain odd compilers like Borland's may have provided it through a nonstandard library and conio.h, and now you're learning what "portable" means.

Fortunately since you're printing to an actual terminal that understands actual escape sequences, nothing prevents you from [url=https://www.unix.com/302356413-post3.html]making your own[/url]. Just print the right characters and your terminal, if capable, should obey it.

[url=http://ascii-table.com/ansi-escape-sequences.php]here's[/url] a table of ASCII escape sequences to help you build on the functions I linked above. To clear a line, for example:

[code]void clearline(void)
{
/* The \r moves it to the beginning of the line */
printf("\r\033[K");
}[/code] Also note you may need to fflush() after calling these functions to make sure they're printed to the screen right when you want them to be, instead of after the next newline you print. Or just fprintf(stderr, "..."); instead of printf("..."); so it'll never buffer -- though you actually want it to buffer for less flicker. If anything you might want to make the buffer bigger -- you could print a whole screenful of stuff in individual bits, then fflush(stdout); to redraw in one whack.

Oh, you're in Windows. We do have a windows section but this isn't it.

Last edited by Corona688; 03-28-2011 at 12:37 PM..

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LEARN ABOUT SUNOS

unpost_menu

menu_post(3CURSES)					     Curses Library Functions						menu_post(3CURSES)

NAME

       menu_post, post_menu, unpost_menu - write or erase menus from associated subwindows

SYNOPSIS

       cc [ flag... ] file... -lmenu -lcurses [ library... ]
       #include <menu.h>

       int post_menu(MENU *menu);

       int unpost_menu(MENU *menu);

DESCRIPTION

       post_menu()  writes  menu to the subwindow. The application programmer must use curses library routines to display the menu on the physical
       screen or call update_panels() if the panels library is being used.

       unpost_menu() erases menu from its associated subwindow.

RETURN VALUES

       These routines return one of the following:

       E_OK		       The routine returned successfully.

       E_SYSTEM_ERROR	       System error.

       E_BAD_ARGUMENT	       An incorrect argument was passed to the routine.

       E_POSTED 	       The menu is already posted.

       E_BAD_STATE	       The routine was called from an initialization or termination function.

       E_NO_ROOM	       The menu does not fit within its subwindow.

       E_NOT_POSTED	       The menu has not been posted.

       E_NOT_CONNECTED	       No items are connected to the menu.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |Unsafe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       curses(3CURSES), menus(3CURSES), panels(3CURSES), attributes(5)

NOTES

       The header <menu.h> automatically includes the headers  <eti.h> and <curses.h>.

SunOS 5.10							    31 Dec 1996 						menu_post(3CURSES)