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  1. #include <iostream>
  2.  
  3. class X {
  4. public:
  5.   X &operator+=(int v) {
  6.     value += v;
  7.     return *this;
  8.   }
  9.  
  10.   int value = 0;
  11. };
  12.  
  13. // Uwaga: referencja w argumencie `x` ponizej nie ma zadnego sensu.
  14. // Wewnatrz funkcji i tak trzeba by wykonac kopie.
  15. X operator+(X x, int v) {
  16.   return (x += v);
  17. }
  18.  
  19. int main() {
  20.   X x;
  21.  
  22.   X y = x + 10;
  23.  
  24.   std::cout << y.value;
  25.   return 0;
  26. }
Success #stdin #stdout 0s 2896KB
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stdin
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Standard input is empty
stdout
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10
https://ideone.com/zY8Vxm
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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