本程序为用面向对象的c++编写的八大行星围绕太阳公转的程序，行星类还设计了卫星-This program is object oriented c++ written in eight major planets around the sun to the program, also designed a satellite planet class

利用MFC程序语言，计算行星（月球）上的两点距离-With MFC, calculate the distance between two points