Finding an int in a vector

We could write the following code
 vector<int>::size_type
 find(const  vector<int>  &v,
                                     const  int  &value)  {
         for  (vector<int>::size_type  i  =  0;
                       i  <  v.size();  ++i)
                 if  (v[i]  ==  value)
                         return  i;
         return  v.size();
 }