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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct IDelegate
  5. {
  6. 	~IDelegate() {}
  7. 	virtual void UpdateDisplay(int) = 0;
  8. };
  9.  
  10. class Display
  11. {
  12. private:
  13.    IDelegate* m_pDelegate;
  14. public:
  15.    Display( IDelegate* pDelegate = NULL)
  16.     : m_pDelegate( pDelegate )
  17.    {
  18.    }
  19.  
  20.    void MyFunc(int iSel)
  21.    {
  22.        if(m_pDelegate)
  23.            if(rand() & 1) //assume
  24.                m_pDelegate->UpdateDisplay(iSel);
  25.    }
  26. }; 
  27.  
  28. ///////
  29.  
  30. class PlaneDlg : public IDelegate
  31. {
  32. private:
  33.    Display m_display;
  34. public:
  35.    PlaneDlg () : m_display ( this )
  36.    {
  37.    }
  38.  
  39.    void UpdateDisplay(int iGrp)
  40.    {
  41.         // do something..
  42.    }
  43. };
  44.  
  45. int main() {
  46. 	// your code goes here
  47. 	return 0;
  48. }
Success #stdin #stdout 0s 3092KB
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https://ideone.com/pEwTYa
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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