已知两个经纬度求距离C++代码

#include 
 
// 角度转弧度
double rad(double d)
{
    const double PI = 3.1415926535898;
    return d * PI / 180.0;
}
 
// 传入两个经纬度，计算之间的大致直线距离
int CalcDistance(float fLati1, float fLong1, float fLati2, float fLong2)
{
    const float EARTH_RADIUS = 6378.137;
 
    double radLat1 = rad(fLati1);
    double radLat2 = rad(fLati2);
    double a = radLat1 - radLat2;
    double b = rad(fLong1) - rad(fLong2);
    double s = 2 * asin(sqrt(pow(sin(a/2),2) + cos(radLat1)*cos(radLat2)*pow(sin(b/2),2)));
    s = s * EARTH_RADIUS;
    s = (int)(s * 10000000) / 10000;
    return s;
}

参考文章：根据经纬度计算两地的距离(C/C++、Python)