虚函数

// test1107.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <iostream>
#include <vector>
using namespace std;

class father{
public:
    int f_age;
    std::string f_name;
    father(int a = 1,std::string n = ""):f_age(a),f_name(n){}
    virtual int get_age(){return f_age;}    
};

class son : public father{
public:
    int s_age;
    std::string s_name;
    son(int a = 0,std::string n = ""):s_age(a),s_name(n){}
    int get_age(){return s_age;}
};


int main(){
    father f;
    son s;
    cout<<f.get_age()<<endl;
    cout<<s.get_age()<<endl;
    system("pause");
}