#include <cstddef>

   #include <iostream>

   using namespace std;

   class CTest{

       public:

           int a = ;

           void outVar(){

              cout << "var a: " << a;

          }

  };

  class CBest{

      public:

          int b = ;

          void outVar(){

              cout << "var b: " << b;

          }

  };

  CTest *fun(CBest* pBest){

      CTest* pTest = new CTest();

      pTest->a = pBest->b;

      return pTest;

  }

  int main(int argc, char **argv)

  {

      CBest* pBest = new CBest();

      pBest->outVar();

      CTest* pRes = fun(pBest);

      pRes->outVar();

      if(pBest != NULL){

          delete pBest;

      }

      if(pRes != NULL){

          delete pRes;

      }

      return ;

  }