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  1. #include <stdio.h>
  2.  
  3. class A
  4. {
  5. public:
  6.     virtual ~A(){}
  7.     void A_Func(void){ printf( "A_Func();\n" ); }
  8. };
  9.  
  10. class B : public A
  11. {
  12. public:
  13.     B() : m_Value(99){}
  14.     void Func(void){ printf( "B value : %d;\n", m_Value ); }
  15.     int m_Value;
  16. };
  17.  
  18. typedef void(A::*A_Callback)(void);
  19. typedef void(B::*B_Callback)(void);
  20.  
  21. class C
  22. {
  23. public:
  24.     void SetCallback( B* pB, B_Callback callback )
  25.     {
  26.         m_pB = pB;
  27.         m_Callback = callback;
  28.     }
  29.     void Do( void )
  30.     {
  31.         (m_pB->*m_Callback)();
  32.     }
  33.     B*         m_pB;
  34.     B_Callback m_Callback;
  35. };
  36.  
  37. int main( void )
  38. {
  39.     B b;
  40.     C c;
  41.     c.SetCallback( &b, &A::A_Func );
  42.     c.Do();
  43.     return 0;
  44. }
Success #stdin #stdout 0.01s 2724KB
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Standard input is empty
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A_Func();
https://ideone.com/iFyvuL
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
secret

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