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  1. #include <iostream>
  2.  
  3. class C {
  4. private:
  5.   int n;
  6. public:
  7.   C() {}
  8.   C(const C &ob) { this->n = ob.n; }
  9.   C(const int n) { this->n = n; }
  10.   ~C(){}
  11.   C &operator=(const C &ob) { this->n = ob.n; return *this; }
  12.   bool operator==(const C &ob) /* const */ { return (this->n == ob.n); }
  13.   friend C operator+(C const &a, C const &b) { C r; r.n = a.n + b.n; return r; }
  14.   friend std::ostream &operator<<(std::ostream &stream, C ob) { stream << ob.n; return stream; }
  15. };
  16.  
  17. int main() {
  18.   C s = 0;
  19.   for (int n = 0; n <= 10; n++)
  20.     s = s + n;
  21.   std::cout << s << std::endl;
  22.   return 0;
  23. }
  24. /* end */
  25.  
Success #stdin #stdout 0s 16048KB
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https://ideone.com/MXvhkC
language:
C++ (gcc 8.3)
created:
8 years ago
visibility:
public

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