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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. template<class T> class test;
  5.  
  6. template <class T>
  7. ostream& operator << (ostream& out, const test<T>& t) {
  8. 	return out<<t.a;
  9. }
  10.  
  11. template <class T>
  12. class test {
  13. 	private:
  14. 	T a;
  15. 	public:
  16. 	test(const T& b) : a(b) {}
  17. 	friend ostream& operator<< <> (ostream&, const test<T>&);
  18. };
  19.  
  20. int main() {
  21. 	test <double> T(3.141);
  22. 	cout<<T;
  23. 	return 0;
  24. }
Success #stdin #stdout 0s 3096KB
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stdin
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Standard input is empty
stdout
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3.141
https://ideone.com/VL5Hhf
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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