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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Test
  5. {
  6. public:
  7.     enum class Fruit
  8.     {
  9.       apple,
  10.       banana,
  11.       orange,
  12.       pineapple,
  13.       lemon
  14.     };
  15.  
  16.     friend Fruit operator++(Fruit& f)
  17.     {
  18.       switch (f)
  19.       {
  20.       case Fruit::apple: return f = Fruit::banana;
  21.       case Fruit::banana: return f = Fruit::orange;
  22.       case Fruit::orange: return f = Fruit::pineapple;
  23.       case Fruit::pineapple: return f = Fruit::lemon;
  24.       case Fruit::lemon: return f = Fruit::apple;
  25.       }
  26.     }
  27. };
  28.  
  29. int main() {
  30. 	// your code goes here
  31. 	Test::Fruit f = Test::Fruit::banana;
  32.  
  33. 	cout << (int)++f << endl;
  34.  
  35. 	return 0;
  36. }
  37.  
Success #stdin #stdout 0s 4492KB
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https://ideone.com/YXEY9n
language:
C++14 (gcc 8.3)
created:
5 years ago
visibility:
public

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