#include <iostream>
 
template <typename T>
class Base
{
public:
    void method() {
        static_cast<T*>(this)->method();
    }
};
 
class Derived1 : public Base<Derived1>
{
public:
    void method() {
        std::cout << "Derived1 method" << std::endl;
    }
};
 
 
class Derived2 : public Base<Derived2>
{
public:
    void method() {
        std::cout << "Derived2 method" << std::endl;
    }
};
 
 
int main()
{
    Base<Derived1> *d1 = new Derived1;
    Base<Derived2> *d2 = new Derived2;
    d1->method();
    d2->method();
    return 0;
}

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