Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:12:8: error: reference to ‘prev’ is ambiguous if(c!=prev){prev=c;k++;} ^ user.cpp:6:31: note: candidates are: int prev int v,c,n,a[10000],b[10000],i,prev,k,p=1,mx=4,poz,aux; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^ user.cpp:12:14: error: reference to ‘prev’ is ambiguous if(c!=prev){prev=c;k++;} ^ user.cpp:6:31: note: candidates are: int prev int v,c,n,a[10000],b[10000],i,prev,k,p=1,mx=4,poz,aux; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^ user.cpp:27:7: error: reference to ‘prev’ is ambiguous if(c!=prev) ^ user.cpp:6:31: note: candidates are: int prev int v,c,n,a[10000],b[10000],i,prev,k,p=1,mx=4,poz,aux; ^ In file included from /usr/include/c++/4.8/bits/stl_algobase.h:66:0, from /usr/include/c++/4.8/bits/char_traits.h:39, from /usr/include/c++/4.8/ios:40, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/bits/stl_iterator_base_funcs.h:193:5: note: template<class _BidirectionalIterator> _BidirectionalIterator std::prev(_BidirectionalIterator, typename std::iterator_traits<_Iter>::difference_type) prev(_BidirectionalIterator __x, typename ^ user.cpp:28:20: error: reference to ‘prev’ is ambiguous {a[p]=c;b[p]=k;prev=c;k=1;p++;} ^ user.cpp:6:31: note: candidates are: int prev