Mail Archives: djgpp/1996/06/13/22:51:09
Reply to message 5274802 from CGO AT DOC DOT NTU DOT A on 06/13/96 5:35AM
> Can anyone tell me how I can specify to put text at certain
>co-ordinates on a screen? Borland has a nice gotoxy command,
>so is there an equivalent in djgpp?
You could simply try 'gotoxy()'. :) It exists within DJGPP as part of
the <conio.h> functions. Just make sure that when you print to the
screen you use the conio print functions, like cputs() and cprintf().
You can look them all up in the docs. The reason you want to
use those instead of regular printf(), etc, is because the conio
functions all interact with the screen directly, while the stdio
functions work through DOS using line buffering. Very strange
results can occur if you mix them up.
> Also, how could I use Info to find this out for myself? I'd
>like to see what other text display handling commands there are.
There are several ways to do this. The easiest way is as follows:
Start info by typing 'info'.
Press TAB until you get to 'libc'.
Press Enter to access the libc info file.
TAB down to 'Functional Categories' and press Enter
TAB down to 'conio functions' and press Enter
You will now see a list of all the direct screen i/o functions that
are in DJGPP's standard libraries. Select the one you want to
look at and press Enter. You can follow cross-references within
the node you are in by TABbing to them, or you can use 'l' to
return to the list of conio functions and pick another one to
examine.
The other way to find a function you are interested in is by invoking
info on the command line. Simply specify the tree of nodes you want
to run down, like so:
info libc alpha gotoxy
You can abbreviate the names of nodes. If you want to go thru the
categories, you can use:
info libc func conio gotoxy
These both go to the same node.
One slightly annoying thing about info is that pressing 'u' (to go "up"
a node within a function description will take you back to the alpha-
betical list instead of the category list, regardless of which you came
there from. There's no way around this, except by using 'l' to trace back
through the nodes you most recently visited.
In general, the best way to use info (or any other program) is to just
play around with it to see how it works. I started out with no idea how
to use it, but now I am an expert in moving around. I've even changed
the setting of the print command so that it prints nodes to a disk file
instead of to the printer. :)
If you are really stuck, just press 'h' at any time to run through info's
brief (but helpful) online tutorial.
Hope this helps!
John
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