getch statement

[kingneb]

I am trying to write a program that takes a single character off the keyboard without having to press the enter key. The getch statement is supposed to do that but it does not. I am using Visual Studio 2008.

As an example:

char input;

input = getch();

switch (input)
{
     case 'A':
        // Stuffing.
        break;
     case 'B':
        // Stuffing.
        break;
     case 'C':
        // Stuffing.
        break;
}

[Dino]

What is the value of input? (perhaps 'a', 'b' or 'c'?)

[master5001]

Some people through out the fact that getch() isn't a standard function. But I think if you are going to use non-standard functions, there are better ways to get keyboard input for a Windows system.

Example:

#include <windows.h>
#define PRESSED(x)  ((x) & 0x80000000)

int main(void)
{
  char keys[256];

  while(1)
  {
    GetKeyboardState(keys);

    if(PRESSED(keys[VK_A]))
      printf("\rA key is down!");
    else
      printf("\rA is not being pressed!");
  }

  return 0;
}

[Elysia]

So far as I'm aware, there is no conio.h header in Visual Studio, hence no getch function.

[matsp]

So far as I'm aware, there is no conio.h header in Visual Studio, hence no getch function.

strictly speaking, one doesn't preclude the other in those two statements.

There is, somewhere in the MS library code, an implementation of getch().

--
Mats

[cpjust]

So far as I'm aware, there is no conio.h header in Visual Studio, hence no getch function.

What version are you using?
I've seen it in every version from 6.0 to 2008.

[Elysia]

I tried it in 2008, although now that it I look at it, the code I was trying used conio, not conio.h.
That was the problem...