开始学C++，继承这块练练手

#include<iostream>
#include<map>
#include<string>
using namespace std;
class Card{
   public :
    Card(){id=0;}
    Card(int _id){ id=_id; }
    ~Card(){}
    Card(const Card& object){ id=object.id;}
    int getID(){return id;}
    void setID(int _id){ id=_id; }
    //void print(){cout<<getID()<<endl;}
    virtual print(){ cout<<getID()<<endl;}//虚函数，子类可重定义虚函数以实现动态绑定
    private:
    //string name;
    int id;
};
class SkillCard: public Card{//继承访问控制
    public:
    SkillCard(string name){skillName=name;}
    string getSkillName(){return skillName;}
    void setSkillName(string name){skillName=name;}
    virtual print(){cout<<getSkillName()<<endl;}
    private:

    string skillName;
};
class RowCard:public Card{
    public:
    //RowCard();
    RowCard(string name){rowName=name;}
    string getRowName(){return rowName;}
    void setRowName(string name){rowName=name;}
    virtual print(){cout<<getRowName()<<endl;}
    private:

    string rowName;
};
class EqCard:public Card{
    public:
    EqCard(string name){eqName=name;}
    string getEqName(){return eqName;}
    void setEqName(string name){eqName=name;}
    virtual print(){cout<<getEqName()<<endl;}
    private:

    string eqName;
};
int main()
{
    Card liubei(1);
    RowCard guanyu("guanyu");
    guanyu.setID(2);
    SkillCard qianrenzhan("qianrenzhan");
    qianrenzhan.setID(100);
    EqCard longdao("longdao");
    longdao.setID(10);
   
    map<int,Card> cardMap; //STL还不太熟，今天看了几眼map
    cardMap.insert(pair<int,Card>(1,guanyu));
    cardMap.insert(pair<int,Card>(10,longdao));
    cardMap.insert(pair<int,Card>(100,qianrenzhan));
   
    map<int,Card>::iterator it; //这个东东叫什么来着，迭代器，挺好的，告别了i,j,k了。
    it=cardMap.find(100);
    cout<<it->second.getID()<<endl;
    return 0;
}