// the Plane 
class Plane
{
   private:
	  int capacity;      // tank capacity
      int left;       //  left tank capacity
      int right;     // right tank capacity
   public:
      // constructor
      Plane();

      // add to tanks
      void addLeft(int leftFill);
      void addRight(int rightFill);

	  //test for full tanks
	  bool tanksFull();
};

// ***********************************************************
//      Plane class implementation
// ***********************************************************

      // constructor
      Plane::Plane()
	  {
		  left = 0; right = 0; capacity = 100;
	  }

      // add to tanks
      void Plane::addLeft(int leftFill)
	  { 
		  left = left + leftFill;
	  }

      void Plane::addRight(int rightFill)
	  {
		  right = right + rightFill;
	  }

	  //test for full tanks
	  bool Plane::tanksFull()
	  {
          bool full = false;
		  if ((left >= capacity)&&(right >= capacity))
		  {
               full = true;
		  }
		  return full;
	  }