c++中的new的应用

代码如下：

   #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 ;
  }