本出租车计费器要实现的功能是出租车按行驶里程收费，起步费为7.0元，行驶3公里后再按2元/公里计费，车停时不计费。能预置起步费和每公里收费，并能模拟汽车启动、停止、车速等状态。-The taxi meter in order to achieve the function is by taxi mileage charges initial fees of 7.0 million, three kilometers later traveling at 2 yuan/km billing, no