坐标正反算。可以有大地坐标计算空间坐标，也可以从空间坐标计算大地坐标。-Balance the positive and negative coordinates. Calculation of geodetic coordinates can be spatial coordinates, spatial coordinates can be calculated from geodetic coordinates.

速算24点,C++源代码示范！本实例有方法的调用和定义声明等！-Speed count 24 points, C++ source code for demonstration! In this instance there are ways to call and the definition of declarations, etc.!