模拟Java枚举的一种方法是使用私有构造函数创建一个类，该类将自身的副本实例化为静态变量：
class Planet { public: // Enum value DECLARATIONS - they are defined later static const Planet MERCURY; static const Planet VENUS; // ... private: double mass; // in kilograms double radius; // in meters private: Planet(double mass, double radius) { this->mass = mass; this->radius = radius; } public: // Properties and methods go here };// Enum value DEFINITIONS // The initialization occurs in the scope of the class, // so the private Planet constructor can be used. const Planet Planet::MERCURY = Planet(3.303e+23, 2.4397e6); const Planet Planet::VENUS = Planet(4.869e+24, 6.0518e6); // ...然后，您可以使用如下枚举：
double gravityonMercury = Planet::MERCURY.SurfaceGravity();
