设计一个三层楼自动电梯控制器，电梯内有三个输入按钮响应用户的上下楼层请求，并有七段数码管显示电梯当前所在楼层位置；在每层电梯入口处设有请求按钮开关，指示用户的上或下的请求。由LED灯显示电梯的上下运动情况和关门信息。-Design a three floors to be automatic elevator controller, elevator there are three buttons respond to user input the fluctuation floor request, and seven period of digital pipe display the current position in the floor　In each layer has requested the entrance elevator button switch, users of the instructions above or below the request. By LED lamp shows up and down the elevator motion and closed information.