undefined identifier getch()
Hey guys, I'm writing a console based tool for windows. To receive the users input, I try to use getch() but the compiler always says Error: undefined identifier getch. When I use getchar() it compiles successfully, but getchar() doesn't returns after a single input. Is there any equivalent version in D for getch? Thanks regards...
Re: undefined identifier getch()
On Wed, 08 Dec 2010 06:06:18 -0500, Nrgyzer nrgy...@gmail.com wrote: Hey guys, I'm writing a console based tool for windows. To receive the users input, I try to use getch() but the compiler always says Error: undefined identifier getch. When I use getchar() it compiles successfully, but getchar() doesn't returns after a single input. Is there any equivalent version in D for getch? Thanks regards... Just a note, dmd on windows does not use Microsoft's C library, it uses Digital Mars'. Therefore, any C functions that are not part of the platform SDK are not available in D. To see what DMC supports, look here: http://www.digitalmars.com/rtl/rtl.html -Steve
Re: undefined identifier getch()
Okay, but what function can I use to get the pressed key?
kbhit/_kbhit seems to do what I want, but hwo can I use it in D? I
always get the error, that kbhit (or similar functions) are not
available.
import std.stdio;
import std.c.stdlib;
import std.c.windows.windows;
void main(string[] args) {
kbhit();
_kbhit();
}
Re: undefined identifier getch()
On Wed, 08 Dec 2010 08:57:40 -0500, Steven Schveighoffer schvei...@yahoo.com wrote: extern(C) int kbhit(void); Um... sorry, D doesn't support void args (copy-paste problem): extern(C) int kbhit(); -Steve
Re: undefined identifier getch()
Great, thanks :)
Re: undefined identifier getch()
On 08/12/2010 11:06, Nrgyzer wrote: Hey guys, I'm writing a console based tool for windows. To receive the users input, I try to use getch() but the compiler always says Error: undefined identifier getch. When I use getchar() it compiles successfully, but getchar() doesn't returns after a single input. Under DMD 1, getch is declared in std.c.stdio. So import that. Under DMD 2, I don't know why it isn't there. But you just need to add this declaration: extern (C) int getch(); Is there any equivalent version in D for getch? D doesn't have its own API for console operations besides stdin/stdout/stderr stuff. I guess it wasn't worth creating one partly because it would be a load of pointless wrappers around C functions, and partly because in these days where everyone uses GUI-based software they're not used as much. Stewart.
Re: undefined identifier getch()
On 08/12/2010 13:25, Nrgyzer wrote: Okay, but what function can I use to get the pressed key? kbhit/_kbhit seems to do what I want, but hwo can I use it in D? I always get the error, that kbhit (or similar functions) are not available. snip kbhit just tests whether there's a keystroke waiting in the keyboard buffer. It doesn't identify the key pressed. If you want to wait for the user to press a key, use getch. If you want to test whether the user has pressed a key, use kbhit, then use getch to determine what key was pressed. For some reason, this seems to work reliably only on ASCII character keys, backspace, tab and carriage return. But this might be partly due to bugs in the DM implementation. Stewart.
