指针访问类的私有成员

#include <iostream>using namespace std;class A{private:int m_a;int m_b;public:A():m_a(0),m_b(0){}int Get_a(){return m_a;}int Get_b(){return m_b;}int Set_a(int ate){m_a = ate;return m_a;}};typedef int (A::*Fun)(int);int main(){A test;cout<<"test.a = "<<test.Get_a()<<endl;cout<<"test.b = "<<test.Get_b()<<endl;cout<<"address of &test : "<<&test<<endl;cout<<"address of &test+1 : "<<&test+1<<endl;cout<<"sizeof(int) : "<<sizeof(int)<<endl;cout<<"sizeof(A) : "<<sizeof(A)<<endl;int* privateA = reinterpret_cast<int*>(&test);int* privateB = reinterpret_cast<int*>(&test) + 1;*privateA = 1;*privateB = 2;cout<<"test.a = "<<test.Get_a()<<endl;cout<<"test.b = "<<test.Get_b()<<endl;cout<<"-------------------"<<endl;Fun pFun = &A::Set_a;cout<<"(test.*pFun)() : "<<(test.*pFun)(14)<<endl;return 0;}

结果：通过指针和成员函数指针可以访问类的私有成员