how to count the number of objects created in c++

Question

how to count the number of objects created in c++

pls explain with a simple example

Answer 1

template 
class Counter
{
  private:
      static int count;
  public:
    Counter()
    {
       count++;
    }  
    Counter(const Counter &c)
    {
       count++;
    }   
    ~Counter()
    {
       count--;
    }    
    static int GetCount() {

         return count;
    }
}

template 
int Counter::count = 0; 



class MyClass : private Counter
{
   public:
      using Counter::GetCount;
}

This technique is called CRTP