模拟KTV智能点播系统，包括用户登录，菜单显示，歌曲添加，后台管理等。-Simulation KTV intelligent on-demand system, including user login, menu display, add songs, background management.

属于二次开发，在已有界面中添加一个圆柱凸台的工具菜单，点击直接绘制出圆柱凸台。-Belongs to the second development, has been added to the interface in a cylindrical boss Tools menu, click directly drawn cylindrical boss.