绝对是好东西啊！基于极大似然估计的三维定位算法，输入参考点的坐标以及观察点的距离，通过极大似然估计算法计算出观察点的坐标，附送支持矩阵运算的C++类库！-Is definitely a good thing! Calculated by maximum likelihood estimation algorithm based on maximum likelihood estimation of three-dimensional positioning algorithm, enter th

计算两点间的坐标距离，通过C++面向对象的方法实现-Calculates the coordinates of the distance between two points, through the C++ implementation