const_iterator转iterator

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#include <deque>#include <iterator>#include <xutility>#include <algorithm>using namespace std;int main(){typedef deque<int> IntDeque;typedef IntDeque::iterator Iter;typedef IntDeque::const_iterator ConstIter;int a[]={0,1,2,3,4,5,6,7,8,9};IntDeque id(a,a+10);Iter i(id.begin());ConstIter ci=find(id.begin(),id.end(),4);//advance(i, distance(i,ci)); // error!////----------------distance_impl------------------------////template<typename InputIterator> //typename iterator_traits<InputIterator>::difference_type //distance(InputIterator first, InputIterator last); //first and last must be same.////-----------------------------------------------------advance(i, distance((ConstIter)i,ci));id.erase(i);return 0;}