Path: utzoo!attcan!uunet!husc6!purdue!umd5!mimsy!chris
From: chris@mimsy.UUCP (Chris Torek)
Newsgroups: comp.lang.c
Subject: Re: How do I get printf to move to a tab position?
Keywords: printf, tab, overwrite
Message-ID: <11710@mimsy.UUCP>
Date: 28 May 88 18:30:34 GMT
References: <242@tahoma.UUCP> <284@dcscg1.UUCP>
Organization: U of Maryland, Dept. of Computer Science, Coll. Pk., MD 20742
Lines: 50

In article <284@dcscg1.UUCP> cpp90221@dcscg1.UUCP (Duane L. Rezac) writes:
>(If someone knows a better way to do this, Please post it. ...

Okay:

>printl(x,y,control,args)
>unsigned char *control;
>unsigned args;
>int x,y;
>{
>  printf("\33[%d;%dH",x,y); /* prints ansi cursor movement command to stdout*/
>  printf(control,args);     /* print data */
>}

x and y are actually used as row and column respectively; so this
should be `y, x' or `row, col'.  In addition, you should use `vprintf'
if you have it, so as to have the correct types and number of arguments
at all times.  Also, the control (format) argument should be `char *'.

#include <stdio.h>
#include <varargs.h>

int
#ifdef __STDC__
rcprint(int row, int col, char *fmt, ...)	/* dpANS */
#else
rcprint(va_alist)				/* K&R &/
	va_dcl
#endif
{
	int nchars;
	va_list ap;
#ifndef __STDC__
	int row, col;				/* K&R */
	char *fmt;

	va_start(ap);
	row = va_arg(ap, int);
	col = va_arg(ap, int);
	fmt = va_arg(ap, char *);
#else
	va_start(ap, fmt);			/* dpANS */
#endif
	nchars = vprintf(fmt, ap);		/* both */
	va_end(ap);
	return (ferror(stdout) ? EOF : nchars);
}
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris@mimsy.umd.edu	Path:	uunet!mimsy!chris