fork download 
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct a {
  5. 	a(int i = 0) : i(i) {}
  6. 	int i;
  7. 	friend ostream& operator <<(ostream& packet, const a *t);
  8. 	friend ostream& operator <<(ostream& packet, const a &t);
  9. 	friend ostream& operator <<(ostream& packet, a *t);
  10. 	friend ostream& operator <<(ostream& packet, a &t);
  11. };
  12.  
  13. // Independent
  14. ostream& operator <<(ostream& packet, const a &t)  {
  15. 	return (packet << t.i);
  16. }
  17.  
  18. // Dependent ones
  19. ostream& operator <<(ostream& packet, const a *t) {
  20. 	return (packet << (*t));
  21. }
  22.  
  23. ostream& operator <<(ostream& packet, a &t) {
  24. 	return (packet << const_cast<const a &>(t));
  25. }
  26.  
  27. ostream& operator <<(ostream& packet, a *t) {
  28. 	return (packet << const_cast<const a *>(t));
  29. }
  30.  
  31. int main() {
  32. 	a rw(42);
  33. 	const a ro(35);
  34. 	cout << rw << endl;
  35. 	cout << &rw << endl;
  36. 	cout << ro << endl;
  37. 	cout << &ro << endl;
  38. 	return 0;
  39. }
Success #stdin #stdout 0s 3296KB
comments (?)
stdin 
Standard input is empty
stdout 
42
42
35
35
https://ideone.com/HHitVt
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!