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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. class IWithOperations {
  6. public:
  7.       // implemented in COperations
  8.       virtual void AddOperation() = 0;
  9. };
  10.  
  11. class IDocInterface : public virtual IWithOperations
  12. {
  13.  public:
  14.       // implemented in CSpecificDoc
  15.       virtual bool CreateDoc() = 0;
  16.  
  17.       // implemented in CDoc
  18.       virtual void Save() = 0;
  19. };
  20.  
  21. class COperations : public virtual IWithOperations
  22. {
  23.  public:
  24.       void AddOperation() {}; // implementation for CDoc and derivates
  25. };
  26.  
  27. class CDoc : public virtual IDocInterface, public virtual COperations
  28. {
  29.     public:
  30.          void Save() {} // implemented here
  31.          virtual bool CreateDoc() = 0; // must be overridden
  32. };
  33.  
  34. class CSpecificDoc : public virtual CDoc
  35. {
  36. public:
  37.       bool CreateDoc() {} // implemented here
  38. };
  39.  
  40. int main() {
  41. 	CSpecificDoc specific;
  42. 	return 0;
  43. }
Success #stdin #stdout 0s 2892KB
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https://ideone.com/BO5bkg
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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