Calculate distance, bearing and more between Latitude/Longitude points

参考链接：Calculate distance, bearing and more between Latitude/Longitude points

#include <string>
using namespace std;

class PointLatLngAlt
{
   
   
public:
    double lat;
    double lng;
    double alt;
    string tag;

public:
    PointLatLngAlt();
    PointLatLngAlt(double dLat, double dLng, double dAlt, string strTag);
    double getDistance(PointLatLngAlt &p2);
    double getBearing(PointLatLngAlt &p2);
    PointLatLngAlt newPos(double bearing, double distance);
	double rad2deg(double dRad);
	double deg2rad(double dDeg);
};

#include <math.h>
#include <iostream>
using namespace  std;

PointLatLngAlt::PointLatLngAlt()
{
   
   

}
/**
* 带初始化的构造函数
*/
PointLatLngAlt::Po