so true

突破private的方法：
=====================================
對于private變量：
方法一：
class Y
{
public:
 Y(int y=0):m_n(y){};
 int getInt(){return m_n;}
private:
 int m_n;
};

Y y(34);
cout<<y.getInt()<<endl;
int* pi=(int*)(&y);
*pi=347;
cout<<y.getInt()<<endl;
方法二：
int tmp;
__asm
{
 mov eax,y.m_n
 mov tmp,eax
 add y.m_n,5
}
cout<<tmp<<' '<<y.getInt()<<endl;
========================================
對于private函數：
class C1
{
public:
 virtual void test()
 {
  cout<<"public C1::test()"<<endl;
 }
};

class C2: public C1
{
private:
 virtual void test()
 {
  cout<<"private C2::test()"<<endl;
 }
};

C2 c2;
C1 * pC1=&c2;
pC1->test();
方法二：
class O;
typedef void (O::*pO)();

class O
{
public:
 static pO getFunTest()
 {
  return &O::test;
 }
private:
 void test()
 {
  cout<<"this is a private function of class O:test()"<<endl;
 }
};
pO pp=O::getFunTest();
O o;
(o.*pp)();