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From: "David C. Hoos, Sr." <david.c.hoos.sr@ada95.com>
Subject: Re: How to get char without press <enter>
Date: 1999/03/02
Message-ID: <AwSKnDLZ#GA.252@pet.hiwaay.net>#1/1
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References: <73a774$2ai@neptunus.cs.kuleuven.ac.be>
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Date: 1999-03-02T00:00:00+00:00
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BIARD EMMANUEL PATRICE wrote in message ...
>Hello everybody,
>
>I would like to know how to get a char without press enter
>I work on Unix plateform (System V)
>Language: ADA, C or anyone who can make an object file.


Here's a simple Ada program:

with Ada.Text_Io;
procedure Tgi is
   Item : Character;
begin
   loop
      Ada.Text_Io.Get_Immediate
        (Item => Item);
      Ada.Text_Io.Put_Line
        ("""" & Integer'Image (Character'Pos (Item)) & """");
      exit when Item = 'Z';
   end loop;
end Tgi;

The above program will echo the characters to the terminal.
If you don't want the characters to echo, you can use this program:

with Ada.Text_Io;
with Interfaces.C;
procedure Tgi is
   pragma Linker_Options ("console_echo.o");
   Item : Character;
   Available : Boolean;
   procedure Set_Console_Echo
     (Fd : Interfaces.C.Int; State : Interfaces.C.Int);
   pragma Import (C, Set_Console_Echo, "set_console_echo");
begin
   Set_Console_Echo (0,0);
   loop
      Ada.Text_Io.Get_Immediate
        (Item => Item,
         Available => Available);
      if Available then
         Ada.Text_Io.Put_Line
           ("""" & Integer'Image (Character'Pos (Item)) & """");
         exit when Item = 'Z';
      end if;
   end loop;
   Set_Console_Echo (0,1);
end Tgi;

Along with this Ada program, you will need to compile the
following C file, named console_echo.c:

#include <termios.h>

struct termios termios_struct;

void set_console_echo (int fd, int state)
{
  tcgetattr (fd, & termios_struct);
  if (state == 0)
    {
      termios_struct.c_lflag &= ~ (ECHO);
    }
  else
    {
      termios_struct.c_lflag |= (ECHO);
    }
  tcsetattr (fd, TCSAFLUSH, & termios_struct);
}


Hope this helps.

David C. Hoos, Sr.