单选题 下列程序的输出结果是( ) public static void main(String[] args) { int y = 18, i = 0; int[] a = new int[8]; do { a[i] = y % 2; i++; y = y / 2; } while (y >= 1); for (int j = i - 1; j > 0; j--) System.out.print (a[j]); }