[Boost-users] How can I use Boost bind library

From: yinglcs2_at_[hidden]
Date: 2006-02-14 11:51:47

I have a function in STL which add the 'area'
attribute of a list of Rect.

float getTotalAreaPerCent(BlockDataList& bdl) {
  return   accumulate (bdl.begin(), bdl.end(), 0.0,
add_area_per_cent<BlockData*, float>());
}

template< class T1, class T2> class add_area_per_cent
: public binary_function<T2, T1,  T2>
{
        public:
                add_area_per_cent() { }
        
                 T2 operator() (T2 initial, T1 element) { 
                  if (element != NULL) {
                          return initial + element->getAreaPerCent();
                  } else {
                    return initial;
                  }
                  }

};

Can you please tell me how can I reduce the amount of
code and use Boost bind library to achieve the same
thing?

Thank you.

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