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  1. #include <iostream>
  2.  
  3. class T {
  4. public:
  5.     int a, b;
  6.     T (int _a = 0, int _b = 0) : a(_a), b(_b) { } // konwersja int -> T, nie moze byc explicit
  7.  
  8.     friend T operator+ (const T &a, const T &b) {
  9.         return T(a.a + b.a, a.b + b.b);
  10.     }
  11.  
  12.     friend T operator+ (const T &a, int b) {
  13.         return a+T(b);
  14.     }
  15.  
  16.     friend T operator+ (int a, const T &b) {
  17.         return T(a)+b;
  18.     }
  19.  
  20.     operator bool () { return (this->b != 0 || this->a != 0); } // bez tego dziala (?)
  21.  
  22.     operator int() = delete; // zabroniona konwersja T -> int (!)
  23. };
  24.  
  25. int main () {
  26.     T a(1, 3);
  27.     std::cout << (a + 1).a << ' ' << (a + 1).b;
  28.     return 0;
  29. }
Success #stdin #stdout 0s 3096KB
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Standard input is empty
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2 3
https://ideone.com/zHLBSb
conversion and operators
http://f...content-available-to-author-only...s.net/C_i_C /253380-niejawna_konwersja?p=1147868#id1147868
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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