Eroare de compilare: main.cpp: In function 'void dostuff()': main.cpp:17:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < n.size(); i++){ ~~^~~~~~~~~~ main.cpp: In function 'void domorestuff()': main.cpp:26:25: error: reference to 'next' is ambiguous bef[n.size() - 1] = next[int(n[n.size() - 1]-'0')]; ^~~~ main.cpp:12:5: note: candidates are: int next [12] int next[12] = {2, 6, 2, 3, 3, 3, 2, 5, 1, 2}; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:205:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^~~~ main.cpp:28:39: warning: for increment expression has no effect [-Wunused-value] for (int i = n.size() - 1; i--; i >= 0){ ~~^~~~ main.cpp:30:19: error: reference to 'next' is ambiguous bef[i] += next[int(n[i]-'0')]; ^~~~ main.cpp:12:5: note: candidates are: int next [12] int next[12] = {2, 6, 2, 3, 3, 3, 2, 5, 1, 2}; ^~~~ In file included from /usr/include/c++/6/bits/stl_algobase.h:66:0, from /usr/include/c++/6/bits/char_traits.h:39, from /usr/include/c++/6/ios:40, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/sstream:38, from /usr/include/c++/6/complex:45, from /usr/include/c++/6/ccomplex:39, from /usr/include/x86_64-linux-gnu/c++/6/bits/stdc++.h:52, from main.cpp:1: /usr/include/c++/6/bits/stl_iterator_base_funcs.h:205:5: note: template<class _ForwardIterator> _ForwardIterator std::next(_ForwardIterator, typename std::iterator_traits<_Iter>::difference_type) next(_ForwardIterator __x, typename ^~~~ main.cpp:32:39: warning: for increment expression has no effect [-Wunused-value] for (int i = n.size() - 1; i--; i >= 0){ ~~^~~~ Non zero exit status: 1