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  1. #include <iostream>
  2. #include <vector>
  3. #include <algorithm>
  4.  
  5. using namespace std;
  6.  
  7. class A
  8. {
  9. public:
  10.     int* p;
  11.  
  12.     A() : p() {}
  13.  
  14.     A(int _) : p(new int(_)) {}
  15.  
  16.     A(const A& a) {
  17.         p = new int(*a.p);
  18.     }
  19.  
  20.     A& operator=(const A& a) {
  21.         cout << "===\n";
  22.         delete p;
  23.         p = new int(*a.p);
  24.         return *this;
  25.     }
  26.  
  27.  
  28.     virtual ~A() {
  29.         delete p;
  30.     }
  31. };
  32.  
  33. void dump(const A& a)
  34. {
  35.     std::cout << *a.p << std::endl;
  36. }
  37.  
  38. int main()
  39. {
  40.     std::vector<A> v;
  41.     v.push_back(A(1));
  42.     v.push_back(A(2));
  43.     v.push_back(A(3));
  44.  
  45.     v.erase(v.begin());
  46.  
  47.     std::for_each(v.begin(), v.end(), dump);
  48.  
  49.  
  50. }
  51.  
Success #stdin #stdout 0.01s 5348KB
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===
===
2
3
https://ideone.com/wnOCUK
language:
C++14 (gcc 8.3)
created:
2 years ago
visibility:
public

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