What will be the output of the following program?

  #include
   class BaseCounter
   {    
       protected:   
       long int count;    
    
       public:   
       void CountIt(int x, int y = 10, int z = 20)    
       {         
            count = 0;     
            cout" " " " 0;   
        }     
        BaseCounter(int x)  
        {       
             count = x ;  
        } 
    };  
    class DerivedCounter: public BaseCounter 
    {   
       public:    
       DerivedCounter() 
       { }   
       DerivedCounter(int x): BaseCounter(x)  
       { } 
  }; 
  int main() 
  {   
      DerivedCounter objDC(30);    
      objDC.CountIt(40, 50);     
      return 0; 
  }