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  1. #include <iostream>
  2.  
  3. class Int
  4. {
  5. public:
  6.     Int(const int& a) : integ(a) {}
  7.  
  8.     friend std::ostream& operator<<(std::ostream& oss, const Int& rhs)
  9.     {
  10.         return oss << rhs.integ;
  11.     }
  12.     int operator+(Int o){return integ+o.integ+1;}
  13.  
  14. private:
  15.     int integ;
  16. };
  17.  
  18. int main()
  19. {
  20.     Int two = 2;
  21.     std::cout << two << " + " << two << " = " << two + two;
  22. }
Success #stdin #stdout 0s 3296KB
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stdin
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Standard input is empty
stdout
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2 + 2 = 5
https://ideone.com/JTbgR4
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
secret

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