本系统由dafi编写，程序版权归原作者所有。本人（顽石，下同）在遵循原作者版权声明之基础上，加以修改和优化，已得现有版本。-The system consists of dafi written program belongs to original author. I (stone, the same below) basis to follow the original author s copyright notice on the modified and optimized alrea