采用多线程实现的单部电梯模拟系统，采用图形界面，接受用户点击来进行响应,用外部的egg库(自行修改过,使之用像素为单位绘图),注释详细,需要在vc下进行编译.-Using multi-threaded implementation of a single simulation system for elevators using a graphical interface, a user clicks to accept the response of the egg with an exter