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  1. #include<iostream>
  2. #include<vector>
  3. using namespace std;
  4.  
  5. class A
  6. {
  7. int *ptr;
  8. public:
  9. 	A(int a)
  10. 	{ 	
  11. 		ptr = new int(a);
  12. 		std::cout<<"Constructor : "<<*ptr<<endl;
  13. 	}
  14. 	A(const A& a)
  15. 	{
  16. 		std::cout<<"Copy Constructor : "<<*(a.ptr)<<endl;
  17. 		ptr = new int(*(a.ptr));
  18. 		*ptr = *a.ptr;
  19. 	}
  20. 	A& operator=(const A& a)
  21. 	{
  22. 		std::cout<<"Copy Assignment "<<*a.ptr<<endl;
  23. 		if(this != &a)
  24. 		{
  25. 			delete ptr;
  26. 			ptr = new int(*a.ptr);
  27. 		}
  28.  
  29. 		return *this;
  30. 	}
  31. 	A(A&& a):ptr(a.ptr)
  32. 	{
  33. 		std::cout<<"Move Constructor : "<<*a.ptr<<endl;
  34. 		a.ptr = nullptr;
  35. 	}
  36. 	A& operator=(A && a)
  37. 	{
  38. 		std::cout<<"Move Assignment : "<<*a.ptr<<endl;
  39. 		if(&a != this)
  40. 		{
  41. 			ptr = a.ptr;
  42. 			a.ptr = nullptr;
  43. 		}
  44. 		return *this;
  45. 	}
  46. 	~A()
  47. 	{
  48. 		std::cout<<"Destructor : ";
  49. 		if(ptr)
  50. 		{
  51. 			std::cout<<*ptr<<endl;
  52. 			delete ptr;
  53. 		}
  54. 	}
  55. };
  56.  
  57. int main()
  58. {
  59. 	vector<A> vec;
  60. 	vec.push_back(A(1));
  61. 	A a1(2);
  62. 	vec.push_back(a1);
  63. 	A a2(3);
  64. 	vec.push_back(std::move(a2));
  65. 	a2 = a1;
  66. 	a1 = A(4);
  67. }
Success #stdin #stdout 0.01s 5564KB
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stdin
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Standard input is empty
stdout
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Constructor : 1
Move Constructor : 1
Destructor : Constructor : 2
Copy Constructor : 2
Copy Constructor : 1
Destructor : 1
Constructor : 3
Move Constructor : 3
Copy Constructor : 1
Copy Constructor : 2
Destructor : 1
Destructor : 2
Copy Assignment 2
Constructor : 4
Move Assignment : 4
Destructor : Destructor : 2
Destructor : 4
Destructor : 1
Destructor : 2
Destructor : 3
https://ideone.com/BU4Hwc
language:
C++ (gcc 8.3)
created:
2 years ago
visibility:
public

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