[C++知识库]c++ 门面模式/外观模式

#include <iostream>
#include <type_traits>
using namespace std;
class MakeCar {
public:
    void makefun() {
        makecarhead();
        makecarbody();
        makecartail();
    }
    virtual void makecarhead() = 0;
    virtual void makecarbody() = 0;
    virtual void makecartail() = 0;
public:
    MakeCar() {
        std::cout << "MakeCar" << std::endl;
    }
    virtual ~MakeCar() {
        std::cout << "~MakeCar" << std::endl;
    }
};


class makeBus : public MakeCar {
public:
    void makecarhead()
    {
        std::cout << "makecarhead" << std::endl;
    }
    void makecarbody()
    {
        std::cout << "makecarbody" << std::endl;
    }
    void makecartail()
    {
        std::cout << "makecartail" << std::endl;
    }
public:
    makeBus() {
        std::cout << "makeBus" << std::endl;
    }
    virtual ~makeBus() {
        std::cout << "~makeBus" << std::endl;
    }
};

int main()
{
    MakeCar* p = new makeBus();
    p->makefun();
    delete p;
    return 0;
}

步骤比较固定，具体的几个步骤里面的具体操作交由子类去完成。