本程序是教学过程中的实践项目！由学生个人开发！该程序简洁明了，容易开懂！方大家参考！由于本人水平有限！请大家不吝赐教塞！-this procedure is the process of teaching the practice of project! Students from personal development! The program concise, easy to understand open! Side reference! Given the limited level!