curses.cpp

/* hello5.c
 *    purpose  bounce a message back and forth across the screen
 *    compile  cc hello5.c -lcurses -o hello5
 */
#include	<curses.h>
#include <unistd.h>

#define	LEFTEDGE	10
#define	RIGHTEDGE	30
#define	ROW		10

int main()
{
    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;
    }
}