How to refresh the screen continuously and update it in real time [closed]

Answer 1

If you are under xterm or VT100 compatible, you can make use of console codes, example:

#include 
#include  /* for sleep */

#define update() printf("\033[H\033[J")
#define gotoxy(x, y) printf("\033[%d;%dH", x, y)

int main(void)
{
    update();
    puts("Hello");
    puts("Line 2");
    sleep(2);
    gotoxy(0, 0);
    puts("Line 1");
    sleep(2);
    return(0);
}

You can do almost everything with escape sequences, but as pointed out in wikipedia: ncurses optimizes screen changes, in order to reduce the latency experienced when using remote shells.