#include<iostream>

 using namespace std;

 class A

 {

     public:

         A()

         {

             a=;

             b=;

             c=;

             f=;

         }

     private:

         int a;

         double b;

         int c;

         double f;

 };

 class B

 {

     public:

         B()

         {

             d=;

             e=;

         }

         void print()

         {

             cout<<e<<endl;

             //cout<<sizeof(d)<<endl;

             //cout<<sizeof(e)<<endl;

         }

     private:

         int d;

         double e;

 };

 int main(int argc, char* argv[])

 {

     A a;

     B* pb= (B*)(&a);//这里必须要强制转换

     //B pb;

     (pb+)->print()<<endl;

     (pb+)->print()<<endl;

     //pb.print();

     return ;

 }