1、　　设计一个出租车自动计费器，具有行车里程计费、等候时间计费、及起价三部分，用四位数码管显示总金额，最大值为99。99元；-one, design a taxi for automatic billing, with mileage billing, the waiting time billing, and three starts, with four Digital Display total amount of the maximum 99. 99;