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copied!<p>Capturing keystrokes under most platforms requires you to access the console directly. Typically there are libraries available to help you with that. Low-level libraries are termcap (which is derived from terminal capabilities) libraries. There is a "portable" layer on top of termcap called curses. Linux uses the GNU version which is called ncurses and is actually available on a multitude of platforms.</p> <p>Curses is extensively documented, you can start a tutorial using </p> <pre><code>$ man ncurses </code></pre> <p>Your problem requires steps to initialize the console and set up keystroke reader. There are several ways to achieve your desired effect. </p> <p>I am posting a working example for you to play with. It shows some basic ideas in curses:</p> <pre><code>/* file: curses_ex1.c */ #include <stdio.h> #include <curses.h> const char rotary[4] = "/-\\|"; int main() { WINDOW *w; int i = 0; w = initscr(); if ( w == NULL ) { return -1; /* unable to initialize curses */ } timeout(500); /* do not block */ mvprintw(0, 0, "Press space bar to break out of the loop."); noecho(); for(i = 0; ; i++) { /* no condition so loops forever */ int c; mvaddch(0, 42, rotary[i%4]); /* display rotator */ c = getch(); /* get a character */ if ( c == ' ') break; if ( c != ERR ) { /* not a space but another valid key */ mvprintw(1, 0, "You need to press a space for me to stop (you pressed `%c')", c); } } endwin(); return 0; } </code></pre> <p>To compile it:</p> <pre><code>cc -o curses_ex1 curses_ex1.c -lcurses </code></pre>

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