C++虚静态函数的实现

主要思路：

• 通过非静态虚函数包裹静态函数
• 将基类的静态函数私有化，迫使派生类必须重写静态函数。

 

 

 class Base{static void foo() { std::cout << "Base: " << count << endl; }protected:static int count;public:Base(){count = 1;}virtual void bar() { foo(); }};int Base::count;class Derived : public Base{static void foo() { std::cout << "Derived: " << count << endl; }public:Derived(){count = 2;}virtual void bar() { foo(); }};

测试代码：

Base* obj = new Derived;obj->bar();delete obj;//Derived: 2