设计模式：模板方法

#include <iostream>

class Abstract_Sport {
public:
    void template_method() {
        start();
        end();
        start();
        end();
    }
    virtual void start() = 0;
    virtual void end() = 0;
};

class Concrete_BasketBall : public Abstract_Sport {
    void start() {
        std::cout << "BasketBall start" << std::endl;
    }
    void end() {
        std::cout << "BasketBall end" << std::endl;
    }
};

class Concrete_FootBall : public Abstract_Sport {
    void start() {
        std::cout << "FootBall start" << std::endl;
    }
    void end() {
        std::cout << "FootBall end" << std::endl;
    }
};

int main(int argc, char* argv[]) {
    std::cout << "---------" << std::endl;
    Abstract_Sport* p = new Concrete_BasketBall();
    p->template_method();
    p->start();
    p->end();
    delete p;
    p = NULL;

    std::cout << "---------" << std::endl;
    p = new Concrete_FootBall();
    p->template_method();
    p->start();
    p->end();
    delete p;
    p = NULL;

    return 0;
}

输出：

BasketBall start
BasketBall end
BasketBall start
BasketBall end
BasketBall start
BasketBall end

FootBall start
FootBall end
FootBall start
FootBall end
FootBall start
FootBall end