To everyone reading, once I waiting for a s

To everyone reading, once I waiting for a solid working solution to accept and close. The highest voted answer works until you re-open the project only.

读这个程序的人，曾经我等待固定答案接受和结贴。仅仅指导我再次打开这个工程的时候，才出现最高投票的（最好的）答案。