class_18:多态

#include <iostream>

using namespace std;

class RemoteCon{
public:
    virtual void openUtils()
    {
        cout<<"base:open "<<endl;
    }
};

class TvRemoteCon:public RemoteCon{
public:
    void openUtils () override
    {
        cout<<"TV open "<<endl;
    }
};

class LightCon:public RemoteCon{
public:
    void openUtils () override
    {
        cout<<"Light open "<<endl;
    }
};

void test(RemoteCon &base)
{
    base.openUtils();
}
int main()
{
    //父类的指针指向子类的对象
    RemoteCon *r = new TvRemoteCon;
    r->openUtils();

    RemoteCon *r1 = new LightCon;
    r1->openUtils();

    //父类的引用指向子类的对象
    TvRemoteCon tv;
    test(tv);//RemoteCon &base = tv
    return 0;
}