利用模板实现virtual 重新覆盖父类函数的功能

#include <cstdlib>
#include <iostream>

using namespace std;
class MyNodeA
{
public:
  void SomeMethod(){cout<<"MyNodeA do sth"<<endl;}
};
class MyNodeB
{
public:
  void SomeMethod(){cout<<"MyNodeB do sth"<<endl;}
};
template<class T>
class Test:public T
{
public:
  ~Test(){cout<<"Test 析构"<<endl;}
  void SomeMethod(){
    T* t = static_cast<T*>(this);
    t->SomeMethod();
  }
};
template<class T>void Do(Test<T>*p)
{
  p->SomeMethod();
  delete p;
}
int main(int argc, char *argv[])
{
    Do(new Test<MyNodeA>);
    Do(new Test<MyNodeB>);
    system("PAUSE");
    return EXIT_SUCCESS;
}