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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. void test1()
  5. {
  6. 	int x = 5;
  7. 	int& y = x;
  8. 	y = 7;
  9. 	cout << "x (" << &x << ") = " << x << ", ";
  10. 	cout << "y (" << &y << ") = " << y << endl;
  11. }
  12.  
  13. void test2() {
  14. 	// doesn't compile!
  15. 	/*
  16. 	int&& x = 5;
  17. 	int&& y = x;
  18. 	cout << "x (" << &x << ") = " << x << ", ";
  19. 	cout << "y (" << &y << ") = " << y << endl;
  20. 	*/
  21. }
  22.  
  23. void test3()
  24. {
  25. 	int&& x = 5;
  26. 	int&& y = 8;
  27. 	y = x;
  28. 	cout << "x (" << &x << ") = " << x << ", ";
  29. 	cout << "y (" << &y << ") = " << y << endl;
  30. }
  31.  
  32. void test4()
  33. {
  34. 	int&& x = 5;
  35. 	int&& y = std::move(x);
  36. 	y = 7;
  37. 	cout << "x (" << &x << ") = " << x << ", ";
  38. 	cout << "y (" << &y << ") = " << y << endl;
  39. }
  40.  
  41. int main()
  42. {
  43. 	test1();
  44. 	test2();
  45. 	test3();
  46. 	test4();
  47. 	return 0;
  48. }
Success #stdin #stdout 0.01s 5532KB
comments (?)
stdin 
Standard input is empty
stdout 
x (0x7ffd8228c124) = 7, y (0x7ffd8228c124) = 7
x (0x7ffd8228c120) = 5, y (0x7ffd8228c124) = 5
x (0x7ffd8228c124) = 7, y (0x7ffd8228c124) = 7
https://ideone.com/CINEuQ
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
secret

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