/* hello5.c *    purpose  bounce a message back and forth across the screen *    compile  cc hello5.c -lcurses -o hello5 */#include	<curses.h>#define	LEFTEDGE	10#define	RIGHTEDGE	30#define	ROW		10main(){	char	message[] = "Hello";	char	blank[]   = "     ";	int	dir = +1;	int	pos = LEFTEDGE ;	initscr();	  clear();	  while(1){		move(ROW,pos);		addstr( message );		/* draw string		*/		move(LINES-1,COLS-1);		/* park the cursor	*/		refresh();			/* show string		*/		sleep(1);		move(ROW,pos);			/* erase string		*/		addstr( blank );		pos += dir;			/* advance position	*/		if ( pos >= RIGHTEDGE )		/* check for bounce	*/			dir = -1;		if ( pos <= LEFTEDGE )			dir = +1;	  }}