Thread: Help Please: Screen Location ( gotoxy? etc )

Well, Ive read the FAQ and done searches of this board and it appears that in theory I should be able to jump to a precise location on the screen as follows:

#include<conio.h>

.....

int i=30,j=50;
gotoxy(i,j);

Unfortunately this does not work on Microsoft QuickC 2.51. Is there another way? I appreciate that I can write direct into the video memory but have found that although this produces an .exe file which works on a machine running Windows 98 it does NOT work on a machine running Windows 2000 Professional. I assume that this is because it uses a totally different address for the screen ( actually I'm surprised it works with Win 98 )

So any ideas? Many thanks.

PS I have concluded that there are lots of different versions of .h files ... not really surprising, I suppose.

Thanks C_Coder but I am trying to write an ultra fast routine ( so anything looping is out ) which puts updates into various locations on the screen as things change.

I need to jump instantly to the right place on the screen and not overright anything on the way or move anything either.

Another alternative is to find a way to locate the start of screen address and just write into the video addresses ( a lot of the routine will be written in assembly language anyway ) This is a program which runs for several days (currently written in Quick Basic ) doing billions ( literally ) of iterations so even tiny delays are very significant.

So - is the location of start of screen memory available anywhere as an address I can refer to? As opposed to just assumming it is at B800 as it usually is ..

Thanks Stoned_Coder. Am using DOS based ( QuickC 2.51 ) system. Have only just looked at your post and have meanwhile solved problem as below:

gotoxy(int x,int y) //Declare Function gotoxy
{
_asm
{
mov dl,x ;x coord
mov dh,y ;y coord
mov bh,0 ;page number ( search me ... )
mov ah,2 ;Interrupt number 2
int 10h ;Call BIOS
}
}

main()
{
system("cls"); //Clear Screen
gotoxy(40,10); //Move cursor
putchar('X'); //Put "X" on screen
}

I find inline asm a lot easier than finding obscure C functions and you are more or less at the coal face...

As for Ralf Brown's list had not heard of it but I assume this is it:

http://www.ctyme.com/rbrown.htm

and you will see the cursor stuff here:

http://www.ctyme.com/intr/rb-0087.htm

As for it being in FAQ you are quite right it is in "various". I had looked but had not spotted it ... obviously it would be under various rather than under cursor - silly me. Here:

http://www.cprogramming.com/boardfaq.html#various