Borderou de evaluare (job #464469)

Eroare de compilare: In file included from /usr/include/c++/4.6/algorithm:63:0, from /usr/include/c++/4.6/i686-linux-gnu/./bits/stdc++.h:64, from user.cpp:1: /usr/include/c++/4.6/bits/stl_algo.h: In function ‘_RandomAccessIterator std::__unguarded_partition(_RandomAccessIterator, _RandomAccessIterator, const _Tp&, _Compare) [with _RandomAccessIterator = cafea*, _Tp = cafea, _Compare = bool (*)(cafea&, cafea&)]’: /usr/include/c++/4.6/bits/stl_algo.h:2265:78: instantiated from ‘_RandomAccessIterator std::__unguarded_partition_pivot(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = cafea*, _Compare = bool (*)(cafea&, cafea&)]’ /usr/include/c++/4.6/bits/stl_algo.h:2306:62: instantiated from ‘void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = cafea*, _Size = int, _Compare = bool (*)(cafea&, cafea&)]’ /usr/include/c++/4.6/bits/stl_algo.h:5445:4: instantiated from ‘void std::sort(_RAIter, _RAIter, _Compare) [with _RAIter = cafea*, _Compare = bool (*)(cafea&, cafea&)]’ user.cpp:27:31: instantiated from here /usr/include/c++/4.6/bits/stl_algo.h:2233:4: error: invalid initialization of reference of type ‘cafea&’ from expression of type ‘const cafea’ /usr/include/c++/4.6/bits/stl_algo.h:2236:4: error: invalid initialization of reference of type ‘cafea&’ from expression of type ‘const cafea’