[001]     #include <curses.h>
[002]
[003]     int main()
[004]     {
[005]             initscr();
[006]             /* Input characters one by one */
[007]             cbreak();
[008]             [i]/* Do not show us what we type */[i]
[009]             noecho();
[010]
[011]             [i]/* Keyboard mapping, stdscr is the typic 24x80 console */[i]
[012]             keypad(stdscr, TRUE);
[013]
[014]             printw("subtronic's little curses demo\n");
[015]
[016]             /* Best way to represent an infinite loop :-) */
[017]             for (;;) {
[018]                     switch (getch()) {
[019]                     case KEY_UP:
[020]                             printw("UP\n");
[021]                             break;
[022]                     case KEY_DOWN:
[023]                             printw("DOWN\n");
[024]                             break;
[025]                     case KEY_LEFT:
[026]                             printw("LEFT\n");
[027]                             break;
[028]                     case KEY_RIGHT:
[029]                             printw("RIGHT\n");
[030]                             break;
[031]                     }
[032]             }
[033]
[034]             endwin();
[035]
[036]             return 0;
[037]     }

Exemplify v0.1 (by subtronic)
Generated: Fri May 13 09:40:57 2005
 
 
[001]     #include <curses.h>
[002]
[003]     // Let us test all comments :-)
[004]
[005]     int main()
[006]     {
[007]             initscr();
[008]             /* Input characters one by one */
[009]             cbreak();
[010]             /* Do not show us what we type */
[011]             noecho();
[012]
[013]             /* Keyboard mapping, stdscr is 24x80 console */
[014]             keypad(stdscr, TRUE);
[015]
[016]             printw("subtronic's little curses demo\n");
[017]
[018]             /* Best way to represent an infinite loop :-) */
[019]             for (;;) {
[020]                     switch (getch()) {
[021]                     case KEY_UP:
[022]                             printw("UP\n");
[023]                             break;
[024]                     case KEY_DOWN:
[025]                             printw("DOWN\n");
[026]                             break;
[027]                     case KEY_LEFT:
[028]                             printw("LEFT\n");
[029]                             break;
[030]                     case KEY_RIGHT:
[031]                             printw("RIGHT\n");
[032]                             break;
[033]                     }
[034]             }
[035]
[036]             endwin();
[037]
[038]             return 0;
[039]     }

#include <conio.h> /* Or whatever header getch may be defined in */
#include <ctype.h>
#include <stdio.h>
 
enum {
  UP = 72,
  LT = 75,
  RT = 77,
  DN = 80,
};
 
int keycode(int c)
{
  return (c == 0 || c == 224) ? getch() : c;
}
 
int main(void)
{
  int c;
 
  while ((c = getch()) != '\r') {
    switch (keycode(c)) {
      case UP: puts("Up"); break;
      case DN: puts("Down"); break;
      case LT: puts("Left"); break;
      case RT: puts("Right"); break;
      default: 
        if (isprint(c))
          printf("%c\n", c);
        else
          printf("%d\n", c);
    }
  }
 
  return 0;
}

#include <stdio.h> 
#include <termios.h> 
#include <unistd.h> 
 
int getch(void) 
{
  int c;
  struct termios old, new;
 
  tcgetattr(STDIN_FILENO, &old);
  new = old;
  new.c_lflag &= ~(ICANON | ECHO);
  tcsetattr(STDIN_FILENO, TCSANOW, &new);
  c = getchar();
  tcsetattr(STDIN_FILENO, TCSANOW, &old);
 
  return c;
}