Curses + C Example

.gitignore

demo
*.swp

demo.c

#include <ncurses.h>
#include <unistd.h>

#define DELAY 35000

int main(int argc, char *argv[]) {
  int x = 0,
      y = 0;

  int max_x = 0,
      max_y = 0;

  int next_x = 0;

  int direction = 1;

  initscr();
  noecho();
  curs_set(FALSE);

  getmaxyx(stdscr, max_y, max_x);

  x = max_x / 2;
  y = max_y / 2;

  while (1) {
    getmaxyx(stdscr, max_y, max_x);

    y = max_y / 2;

    clear();
    mvprintw(y, x, "o");
    refresh();

    usleep(DELAY);

    next_x = x + direction;

    if (next_x >= max_x || next_x < 0) {
      direction*= -1;
    } else {
      x+= direction;
    }

  }

  endwin();

  return 0;
}

Makefile

CFLAGS=-Wall
LDFLAGS=-lncurses

all: demo

clean:
	rm -rf demo

You should replace LDFLAGS by LDLIBS. Here's a quote from the entry for LDFLAGS in the GNU make manual:

Libraries (-lfoo) should be added to the LDLIBS variable instead.

You could then simplify your Makefile to something like this:

CFLAGS = -g -Wall
LDLIBS = -lncurses

.PHONY: clean

all: demo

clean:
    rm -rf demo

@meliodus @erm3nda I found a better way to exit the program. If you state that the getch() should be non-blocking, it instantly is.

Just call this in the main:
nodelay(stdscr, TRUE)

then do the other stuff:

int ch;
if ((ch = getch()) == KEY_F(1)) {//F1 will make you escape here
break();
}

should do the trick.

See for more details:
https://www.gnu.org/software/guile-ncurses/manual/html_node/Getting-characters-from-the-keyboard.html
http://www.cs.ukzn.ac.za/~hughm/os/notes/ncurses.html#using

Sir what if i want to use KEY_F(1) to exit from this loop ? .. i don't want to use ctrl+c to exit ..

change it