Thread: Can someone tell me if I've lost the plot

This is a discussion that's been going on on another board that I visit every now and again.

Code:

Poster1

   .....

   Now if someone can tell me how to take a single character 
   without requiring enter to be pressed, that'd also be ace.

   Cheers.

Poster2

   Well, the only function I know is getch()... not sure if it's the 
   best way to do it though, haven't done C code for aaaages

Azuth
 
   getc, fgetc, getchar - getch() would likely work, but is not
   standard.

Poster3
 
   only on windows.. you need to do termios stuff on unix 
   like:

  #include <termios.h>

  struct termios term;

  tcgetattr(0, &term)
  term.c_lflag &= ~ICANON; // turn off cooked mode
  term.c_cc[VMIN] = 0; // no minimum chars
  term.c_cc[VTIME] = 0; // no hold-keys for time
  tcsetattr(0, TCSANOW, &term)

  // read one char/key from tty
  i = read(0, &ch, 1);

  tcsetattr(0, TCSANOW, &origterm) // restore original settings

Azuth
 
   *Cough* *Hack* *Splutter*

   You're saying that I can't read a single character under unix 
   using only ANSI C? Or did I miss something?

Now I'll admit the only code I've ever worked with on a *nix platform has been to do with quake, and I don't have a *nix box set up at home right now to try, so I may be mistaken, but surely I could write the code to read a single char in DOS in ANSI C, and compile that on a unix box & run it without much issue???

Originally posted by Azuth

Now I'll admit the only code I've ever worked with on a *nix platform has been to do with quake, and I don't have a *nix box set up at home right now to try, so I may be mistaken, but surely I could write the code to read a single char in DOS in ANSI C, and compile that on a unix box & run it without much issue???

Nope. Well, yes. But no.

You could, but it'd be ugly:

Code:

#ifdef NIX
#include nix_specific_headers
int mygetc( )
{
    do_stuff( here );
}
#else
#include dos_specific_headers
int mygetc( )
{
    do_stuff( here );
}
#endif

use = mygetc( );

So yeah, you can do it. But not as simply as you want to. Your best bet in *nix is to use the curses library.

Quzah.