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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. template <typename T> class Array;
  6. template <typename T> ostream& operator<<(ostream& os, const Array<T> &ar);
  7.  
  8. template <typename T>
  9. class Array {
  10. public:
  11.     Array() : x(10) {}
  12. 	friend ostream& operator<< <>(ostream& os, const Array<T> &ar);
  13.  
  14. private:
  15. 	int x;
  16. };
  17.  
  18. template <typename T>
  19. ostream& operator<<(ostream& os, const Array<T> &ar) {
  20. 	os << "array data: " << ar.x;
  21. 	return os;
  22. }
  23.  
  24. int main() {
  25. 	Array<int> arr;
  26. 	cout << arr;
  27. 	return 0;
  28. }
  29.  
Success #stdin #stdout 0s 2852KB
comments (?)
stdin
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Standard input is empty
stdout
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array data: 10
https://ideone.com/9XAa05
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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