C++虚函数表

// 尹成学习虚函数表.cpp : 定义控制台应用程序的入口点。

//

#include "stdafx.h"

#include<iostream>

using namespace std;

typedef void(*Fun)(void);

class father{

public:
virtual void swim(){
cout<<"老子在游泳"<<endl;
}
void play(){
cout<<"老子在玩"<<endl;
}

    virtual  void eat(){
cout<<"老子在吃饭"<<endl;
}
virtual void good1(){
cout << "好的fahter" << endl;
}

};

class son:public father{

public:
int n;
void swim(){
cout<<"儿子在游泳"<<endl;
}
virtual void play(){
cout<<"儿子在玩"<<endl;
}
virtual void good(){
cout << "好的" << endl;
}

};

class mm{

public:
int b;

};

//虚函数表的顺序是按照先父亲后儿子，如果儿子有方法覆盖，则忽略父亲的虚函数

//用儿子覆盖的函数代替

int _tmain(int argc, _TCHAR* argv[])

{
father* s=new son;
cout<<"老子大小="<<sizeof(father)<<endl;
cout << "儿子大小=" << sizeof(son) << endl;
cout<<"mm大小="<<sizeof(mm)<<endl;
for(int i=0;i<4;i++){
Fun f=(Fun)*((int*)*(int*)(s)+i);
f();
//cout<<(int*)*(int*)(s)+i<<"   "<<f<<endl;
}


return 0;

}