[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 OSX

ansi_code

term::ansi::code(n)						 Terminal control					       term::ansi::code(n)

_________________________________________________________________

NAME

       term::ansi::code - Helper for control sequences

SYNOPSIS

       package require Tcl  8.4

       package require term::ansi::code  ?0.1?

       ::term::ansi::code::esc str

       ::term::ansi::code::escb str

       ::term::ansi::code::define name escape code

       ::term::ansi::code::const name code

_________________________________________________________________

DESCRIPTION

       This package provides commands enabling the definition of control sequences in an easy manner.

       ::term::ansi::code::esc str
	      This command returns the argument string, prefixed with the ANSI escape character, "33."

       ::term::ansi::code::escb str
	      This command returns the argument string, prefixed with a common ANSI escape sequence, "33[".

       ::term::ansi::code::define name escape code
	      This  command defines a procedure name which returns the control sequence code, beginning with the specified escape sequence, either
	      esc, or escb.

       ::term::ansi::code::const name code
	      This command defines a procedure name which returns the control sequence code.

BUGS, IDEAS, FEEDBACK
       This document, and the package it describes, will undoubtedly contain bugs and other problems.  Please report such in the category term	of
       the  Tcllib  SF	Trackers [http://sourceforge.net/tracker/?group_id=12883].  Please also report any ideas for enhancements you may have for
       either package and/or documentation.

KEYWORDS

       control, declare, define, terminal

COPYRIGHT

       Copyright (c) 2006 Andreas Kupries <andreas_kupries@users.sourceforge.net>

term									0.1						       term::ansi::code(n)