C++中两个类中互相包含对方对象的指针问题(转载)

出处:http://www.cnblogs.com/hanxi/archive/2012/07/25/2608068.html

 // A.h
 #include "B.h"
 class A
 {
 public:
     A(B* pB):m_pB(pB) {}
     void useB();
 private:
     B* m_pB;
 };

 //A.cpp
 #include "A.h"
 void A::useB()
 {
     //do something for m_pB
 }

 //B.h
 class A;
 class B
 {
 public:
     B(A* pA):m_pA(pA) {}
     void useA();

 private:
     A* m_pA;
 };

 //B.h
 #include "A.h"
 #include "B.h"
 void B::useA()
 {
     //do something for m_pA
     m_pA = new A;
 }