Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:59:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<arr.size(); i++) ^ In file included from /usr/include/c++/4.8/algorithm:62:0, from user.cpp:6: /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<homework*, std::vector<homework> >; _Tp = homework; _Compare = bool (*)(homework&, homework&)]’: /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<homework*, std::vector<homework> >; _Compare = bool (*)(homework&, homework&)]’ /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<homework*, std::vector<homework> >; _Size = int; _Compare = bool (*)(homework&, homework&)]’ /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<homework*, std::vector<homework> >; _Compare = bool (*)(homework&, homework&)]’ user.cpp:55:49: required from here /usr/include/c++/4.8/bits/stl_algo.h:2287:35: error: invalid initialization of reference of type ‘homework&’ from expression of type ‘const homework’ while (__comp(*__first, __pivot)) ^ /usr/include/c++/4.8/bits/stl_algo.h:2290:34: error: invalid initialization of reference of type ‘homework&’ from expression of type ‘const homework’ while (__comp(__pivot, *__last)) ^ user.cpp:35:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFin, "%d", &tests); ^ user.cpp:39:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFin, "%d", &n); ^ user.cpp:47:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(pFin, "%d %d", &time, &dead); ^