C++虚函数示例

#include<iostream>
#include<tchar.h>
using namespace std;
class CBase
{
public :
    void fun()
    {
        cout<<_T("CBase:fun")<<endl;
    }
    virtual void vfun1()
    {
        cout<<_T("CBase:vfun1")<<endl;
    }
    virtual void vfun2()
    {
        cout<<_T("CBase:vfun2")<<endl;
    }
};

class CDerive:public CBase
{
public :
    void fun()
    {
        cout<<_T("CDerive:fun")<<endl;
    }
    virtual void vfun1()
    {
        cout<<_T("CDerive:vfun1")<<endl;
    }
};

int _tmain(int argc, _TCHAR* argv[])
{
    CDerive derive;
    CBase* pBase = (CBase*)&derive;
    pBase->fun();
    pBase->vfun1();
    pBase->vfun2();

    cout<<hex<<*((int*)(*((int*)&derive)))<<endl;
    cout<<hex<<*((int*)(*((int*)&derive))+1)<<endl;
    cin.get();
    return 0;
}