#include <curses.h>

int main()
{
  int x=COLS/2, y=LINES/2;
  int ch;
  initscr();
  cbreak();
  noecho();
  keypad(stdscr, TRUE);
  while (1) {
    mvaddch(y, x, '*');
    move(y, x);
    refresh();
    ch = getch();
    delch();                    /* 文字を消す */
    switch (ch) {
    case KEY_LEFT:
    case 'h':
      x-=2;
      break;
    case KEY_RIGHT:
    case 'l':
      x+=2;
      break;
    case KEY_UP:
    case 'k':
      y--;
      break;
    case KEY_DOWN:
    case 'j':
      y++;
      break;
    case 'q':
      x=999;
    }
    if (x == 999) break;
    x = (x+COLS)%COLS;          /* 必ず 0〜COLS-1 に納める */
    y = (y+LINES)%LINES;        /* 必ず 0〜LINES-1 に納める */
  }
  endwin();
}