Help needed in accessing a vector member using iterator

[irshan]

Dear all
I need some help in accessing a vector member by using iterator, the vector xb and d are of same dimension. I am trying following code but it is not working

....

std::vector<float>::iterator result;

std::vector<float> xb;
std::vector<float> d;
...
min_dis=5;
result =std::find(d.begin(), d.end(), min_dis);
...
float xbest;

xbest=xb.at(result);

.......

while running this code I am getting this error

error: no matching function for call to ‘std::vector<float, std::allocator<float> >::at(__gnu_cxx::__normal_iterator<float*, std::vector<float, std::allocator<float> > >&)’
/usr/include/c++/4.4/bits/stl_vector.h:650: note: candidates are: typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::reference std::vector<_Tp, _Alloc>::at(size_t) [with _Tp = float, _Alloc = std::allocator<float>]
/usr/include/c++/4.4/bits/stl_vector.h:668: note: typename std::_Vector_base<_Tp, _Alloc>::_Tp_alloc_type::const_reference std::vector<_Tp, _Alloc>::at(size_t) const [with _Tp = float, _Alloc = std::allocator<float>]

[irshan]

I found the mistake :)

it reuires following lies


int ax;
ax=(result - d.begin());
xbest=xb.at(ax-1);