// Dynamic constructor in C++
// Constructor can allocate dynamically created memory to the object .
// Thus,object is going to use memory region , which is dynamically created by constructor. 
#include <iostream>

class Dummy{
  private:
  int a,b;
  int *p; // pointer
  Dummy() // Default constructor 
  {
      a= 2;
      b = 3;
      p = new(int);
  }
  Dummy(int x,int y ,int z)//Dynamic constructor (because after call of constructor the dynamic 
  // variable is created and its address is store in instance variable pointer p.
  {
      a = x;
      b = y;
      p = new(int);
      *p = z;
  }
};
int main()
{
    Dummy d1,d2(1,2,4);
    return 0;
}