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  1. #include <iostream>
  2. #include <memory>
  3. using namespace std;
  4.  
  5. struct Foo
  6. {
  7. 	Foo() { cout << "*"; }
  8. 	~Foo() { cout << "@"; }
  9. 	Foo(const Foo&) { cout << "="; }
  10.  
  11. };
  12.  
  13. int main() {
  14. 	// your code goes here
  15.  
  16. 	cout << "construct:";
  17. 	Foo *foo = new Foo[5];
  18. 	cout << endl;
  19.  
  20. 	int *p = new int;
  21. 	cout << "int: " << *p << endl;
  22. 	delete p;
  23.  
  24. 	int *n = new int[5];
  25. 	for (int i = 0; i < 5; i++)
  26. 		cout << n[i] << " ";
  27. 	cout << endl;
  28. 	delete [] n;
  29.  
  30. 	cout << "destruct:";
  31. 	delete [] foo;
  32. 	cout << endl;
  33.  
  34.  
  35. 	cout << "************" << endl;
  36.  
  37. 	allocator<Foo> allo;
  38.  
  39. 	Foo *a;
  40. 	Foo b;
  41.  
  42. 	cout << endl << "+++" << endl;
  43.  
  44. 	a = allo.allocate(5);
  45.  
  46. 	//new ((void*)(a+2)) Foo(b);
  47.  
  48. 	allo.construct(a, b); cout << endl;
  49.  
  50. 	cout << "fo" << endl;
  51.  
  52. 	allo.destroy(a);
  53.  
  54. 	allo.deallocate(a, 0); cout << endl;
  55.  
  56. 	cout << "************" << endl;
  57.  
  58. 	return 0;
  59. }
Success #stdin #stdout 0s 3428KB
comments (?)
stdin
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Standard input is empty
stdout
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construct:*****
int: 0
0 0 0 0 0 
destruct:@@@@@
************
*
+++
=
fo
@
************
@
https://ideone.com/02Eirn
language:
C++ (gcc 8.3)
created:
10 years ago
visibility:
public

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