编写计算正方体，圆柱体，球体的表面积和体积，要求：
1这三个类要有一个公共的基类。
2 这三个类计算正方体，圆柱体，球体的表面积和体积的成员函数名字相同
3按照运行时的多态性方法设计一个测试主函数，并进行测试。(Written to calculate the cube, cylinder, sphere surface area and volume requirements:
1 the three classes have a common base class.
2 of the three classes to calculate cube, cylinder, member function name sphere surface area and volume of the same
3 design a test main function and test it according to the run time polymorphism method.)