车子里程记录表，用GPS经纬度计算距离，驱动LCD显示-Car mileage record sheet, calculate the distance by GPS latitude and longitude, driven LCD display

一共有两个类，一个是描述三维点类型的，另一个是描述通过经纬度计算距离和角度方法的-A total of two classes, one is to describe the three-dimensional point type, and the other is to describe the method of calculating the distance and angle by latitude and longitude