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  1. #include<iostream>
  2.  
  3. using namespace std;
  4. class A
  5. {
  6.     int x;
  7.     static int count;
  8.   public:
  9.     A(int x)
  10.     {
  11.         this->x = x;
  12.         count++;
  13.     }
  14.     ~A()
  15.     {
  16.         count--;
  17.     }
  18.     static int quantity()
  19.     {
  20.         return count;
  21.     }
  22. };
  23. int A::count = 0;
  24. int main()
  25. {
  26.     cout << "Count object: " << A::quantity() << endl;
  27.     A* p1, *p2, *p3;
  28.     p1 = new A(1);
  29.     p2 = new A(2);
  30.     p3 = new A(*p2);
  31.     cout << "Count object: " << A::quantity() << endl;
  32.     delete p1;
  33.     delete p2;
  34.     cout << "Count object: " << A::quantity() << endl;
  35.     delete p3;
  36.     cout << "Count object: " << A::quantity() << endl;
  37. }
  38.  
  39.  
Success #stdin #stdout 0s 15240KB
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stdin
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Standard input is empty
stdout
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Count object: 0
Count object: 2
Count object: 0
Count object: -1
https://ideone.com/faKgLf
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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