Device Counter

// #include <iostream>
// using namespace std;

// class Device {
// private:
//    int id;
//    static int count;
// public:
//    Device(int id_) : id(id_) {
//        count++;
//    }
//    static int getCount() {
//        return count;
//    }
// };

// // static member is also required to declare out of class 
// int Device::count = 0;

// int main() {
//    Device d1(1);
//    Device d2(2);
//    Device d3(3);
//    cout << "Total devices created: " << Device::getCount();
//    return 0;
// }



#include<iostream>
using namespace std;

class Device{
   private:
      //int id;
      static int count;
   public:
      Device(int id_) : id(id_){
         count++;
      }
      static int getCount(){
         return count;
      }

};

int Device:: count =0;

int main(){
   Device d1;
   Device d2;
   Device d3;

   cout<<"Total devices created: "<< Device::getCount();
}

// class Device {
//    private:
//       static int count;

//    public:
//       Device(){
//          count++;
//       }

//       static int getCount(){
//          return count;
//       }
// };