getch();

What will getch() return for these keys:

Left Arrow
Right Arrow
Up Arrow
Down Arrow
ESC
F1-12
Tab
Enter
Shift
CTRL
ALT
Backspace

like in this

switch (getch())
{
case LEFT ARROW:
blah blah
break;
}

Why don't you enter this in the compiler and check it for yourself:

Code:

---

#include <iostream.h>
#include <conio.h>

int main()
{
  char ch = getch();

  cout << ch << endl;
  return 0;
}

---

Most if not all of those keys will cause the program to not display anything. This is because they do not have corresponding ASCII codes.

Of course, ya never know. A few might bring some unexpected results...

Up, down, left, and right arrow shows 0 in my ASCII codes... :o

Well, there ya have it.

up is 72,
down is 80,
right is 77,
left is 75

If this is what you're looking for, no thanx needed. if not, Then i don't know

Okay, I got it to do letters. K = left H = up P = down M = right

Now when I press an arrow it returns zero the first time I press it, then it returns the letter. WTF? Why does it do this, and can I override it doing that? Or do I need to just tell the user to press left twice or down twice to move.

I think it has something to do with upper and lower bytes... Well, I don't know so I should probably just shut up :).

hi

simply use this code:

x=getch();
if(x==0) // is special key else is normal key (a, b, RETURN, ESC ....)
y=getch(); // number of y is the key pressed (up, down, F1, F2...)

i hope this helps.

bye


PLEASE HELP ME WITH MY MOUSE IN 800x600 24 BIT MODE!!!

You can try this out if you like. A sort of in the works project. :)

#include <stdio.h>
#include <conio.h>

#define KEYBOARD 0x60
#define KCONTROL 0x61
#define KINTCONTROL 0x20

#define LARROW 75
#define RARROW 77

// continue from there

#define F_1 59
#define F_2 60

// continue from there

int key;

int getKey(void);

int main()
{

getKey();

switch(key)
{
case LARROW: printf("\nleft arrow key pressed.");
break;
case F_1: printf("\nF1 key pressed.");
break;
// and so on

}

return 0;
} // end main

int getKey(void)
{
printf("\nPress a key: ");
key = getch();

_asm
{
sti
in al,KEYBOARD
xor ah,ah
mov key,ax
in al,KCONTROL
or al,82h
out KCONTROL,al
and al,7fh
out KCONTROL,al
mov al,20h
out KINTCONTROL,al
}
return key;
}

I hope there are no typoes as this was rushed.

thats okay, I'm just going to make it loop the getch() again if it's zero. That way it don't flash, because the character and the HP/MP flash everytime you take a step for some reason.

Ah, A RPG hound then? A 3D game?

did this, it gets the arrow keys and does *something* depending on which arrow key. Pretty simple, should be easy to modify for your use.

//code:
void cursor()
{
// getch();

int c = 1;
int ch = 0;

while (ch != c)
{
ch = getch();

// cout << ch << endl;
if(ch == 72) // if UP
cout << "^" << endl;
if(ch == 80) // if Down
cout << "d" << endl;
if(ch == 75) // if left
cout << "<" << endl;
if(ch == 77) // if right;
cout << ">" << endl;
}

}
// ^^ end code!