Eroare de compilare: user.cpp: In function ‘double cmap(int, int, std::vector<Punct>&, std::vector<Punct>&)’: user.cpp:64:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < w.size(); i++) ^ user.cpp:66:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = i + 1; j < w.size() && j < i + 8; j++) ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:4: /usr/include/c++/4.8/bits/stl_algo.h: In instantiation of ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<Punct*, std::vector<Punct> >; _Tp = Punct; _Compare = int (*)(Punct&, Punct&)]’: /usr/include/c++/4.8/bits/stl_algo.h:2319:78: required from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<Punct*, std::vector<Punct> >; _Compare = int (*)(Punct&, Punct&)]’ /usr/include/c++/4.8/bits/stl_algo.h:2360:62: required from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = __gnu_cxx::__normal_iterator<Punct*, std::vector<Punct> >; _Size = int; _Compare = int (*)(Punct&, Punct&)]’ /usr/include/c++/4.8/bits/stl_algo.h:5513:44: required from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = __gnu_cxx::__normal_iterator<Punct*, std::vector<Punct> >; _Compare = int (*)(Punct&, Punct&)]’ user.cpp:93:37: required from here /usr/include/c++/4.8/bits/stl_algo.h:2287:35: error: invalid initialization of reference of type ‘Punct&’ from expression of type ‘const Punct’ while (__comp(*__first, __pivot)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2290:34: error: invalid initialization of reference of type ‘Punct&’ from expression of type ‘const Punct’ while (__comp(__pivot, *__last)) ^