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  1. #include <string>
  2. #include <iostream>
  3.  
  4. class BaseIf
  5. {
  6. public:
  7.     virtual ~BaseIf() {}
  8.  
  9.     virtual std::string getName() = 0;
  10. };
  11.  
  12. class IntIf : public virtual BaseIf
  13. {
  14. public:
  15.     virtual ~IntIf() {}
  16.  
  17.     virtual int getValue() = 0;
  18. };
  19.  
  20. class FloatIf : public virtual BaseIf
  21. {
  22. public:
  23.     virtual ~FloatIf() {}
  24.  
  25.     virtual float getValue() = 0;
  26. };
  27.  
  28. class BaseBlock : public virtual BaseIf
  29. {
  30.   public:
  31. 	std::string getName () override { return "whoa dude"; }
  32. };
  33.  
  34. class IntBlock : public virtual IntIf
  35. {
  36.   public:
  37.     int getValue() override { return 42; }
  38. };
  39.  
  40. class BaseImpl : public BaseBlock {};
  41.  
  42. class IntImpl : public BaseBlock, public IntBlock {};
  43.  
  44. int main()
  45. {
  46.    BaseIf* bif = new IntImpl;
  47.    std::cout << bif->getName() << "\n";
  48.  
  49.    IntImpl iimp;
  50.    std::cout << iimp.getName() << "\n";
  51.  
  52. }
Success #stdin #stdout 0s 4524KB
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Standard input is empty
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whoa dude
whoa dude
https://ideone.com/FXxQLm
language:
C++14 (gcc 8.3)
created:
4 years ago
visibility:
public

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