From:	rrd AT ftc DOT agilent DOT com (Ray Depew)
Newsgroups:	comp.os.msdos.djgpp
Subject:	DOS cursor/screen commands?
Date:	Fri, 15 Nov 2002 17:18:10 +0000 (UTC)
Organization:	Agilent Technologies
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I'm trying to do the equivalent of DOS "cls" in a C program.  When I run the
following program, all I get on stdout is the following three lines.

     Hello
     *[2J
     Goodbye

What I've shown as an asterisk is a "left-arrow" character representing the
escape character.  What am I doing wrong?  And is there a better way to do it?


/* file 'clrscrn.c' */
/* Ray Depew 14 Nov 2002 11:00 */
/* An attempt to clear the screen under program command. */

/* 'Clear screen' for MSDOS is defined as ESC[2J, 
 * where ESC is the escape character, ASCII 27,
 * and 2 can be any integer or omitted completely, 
 * according to
 * <http://www3.sympatico.ca/rhwatson/dos7/v-ansi-commands.html>
 */

int main()
{
	printf("Hello\n");
	printf("\033[2J"); /* this is the "clear screen" escape sequence */
	printf("Goodbye\n");

	return 0;
}



--
Regards                | C++ is like a Swiss Army knife with a chainsaw 
Ray Depew              | attachment.  You can program most anyway you want, 
                       | but it's really, really easy to cut your leg off.
ray_depew AT agilent DOT com  | -- Alex Pavloff explains C++ on comp.arch.embedded

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