static counter : static « Class « C++

1. C++
2. Class
3. static

static counter

  
#include <iostream>
using namespace std;
class SomeClass 
{
  public:
    static int count;
    SomeClass(int value) 
    { 
      count++; 
      my_data = value;
    }; 
    SomeClass(int value, int static_value) 
  {
      count = static_value;
      my_data = value; 
  };
    ~SomeClass(void) { count--; };
    int my_data;
};      

int SomeClass::count;

int main(void)
 {
   SomeClass One(1, 999); 
   cout << "One: " << One.my_data << ' ' << One.count << endl ;
   
   SomeClass Two(2);
   cout << "Two: " << Two.my_data << ' ' << Two.count << endl ;
   
   SomeClass Three(3);
   cout << "Three: " << Three.my_data << ' ' << Three.count << endl ;
}
  
    
  

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