Using a static data member in a class : static « Class « C++






  1. C++
  2. Class
  3. static

Using a static data member in a class

  
#include <iostream>
   using namespace std;

   class CBox                   
   {
      public:
         static int objectCount;

         CBox(double lv, double bv = 1.0, double hv = 1.0): m_Length(lv),
                                                            m_Breadth(bv),
                                                            m_Height(hv)
         {
            cout << "Constructor called.";
            objectCount++;
         }

         CBox()
         {
            cout << "Default constructor called.";
            m_Length = m_Breadth = m_Height = 1.0;
            objectCount++;
         }
         double Volume() const
         {
            return m_Length*m_Breadth*m_Height;
         }

      private:
         double m_Length;
         double m_Breadth;
         double m_Height; 
   };

   int CBox::objectCount = 0;
                             

   int main()
   {
      CBox boxes[5];         
      CBox cigar(8.0, 5.0, 1.0);

      cout << CBox::objectCount;

      cout << boxes[2].objectCount;

      return 0;
   }








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