Eroare de compilare: user.cpp:7:20: error: ‘std::priority_queue<int> free’ redeclared as different kind of symbol priority_queue<int>free; ^ In file included from /usr/include/c++/5/cstdlib:72:0, from /usr/include/c++/5/ext/string_conversions.h:41, from /usr/include/c++/5/bits/basic_string.h:5249, from /usr/include/c++/5/string:52, from /usr/include/c++/5/bits/locale_classes.h:40, from /usr/include/c++/5/bits/ios_base.h:41, from /usr/include/c++/5/ios:42, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/stdlib.h:483:13: note: previous declaration ‘void free(void*)’ extern void free (void *__ptr) __THROW; ^ user.cpp: In function ‘int main()’: user.cpp:20:14: error: request for member ‘push’ in ‘free’, which is of non-class type ‘void(void*) throw ()’ free.push(-i); ^ user.cpp:27:18: error: request for member ‘push’ in ‘free’, which is of non-class type ‘void(void*) throw ()’ free.push(-pr); ^ user.cpp:29:18: error: request for member ‘top’ in ‘free’, which is of non-class type ‘void(void*) throw ()’ pr=-free.top(); ^ user.cpp:31:14: error: request for member ‘pop’ in ‘free’, which is of non-class type ‘void(void*) throw ()’ free.pop(); ^