Eroare de compilare: user.cpp:20:5: error: ‘int index’ redeclared as different kind of symbol int index; ^ In file included from user.cpp:6:0: /usr/include/string.h:482:1: error: previous declaration of ‘const char* index(const char*, int)’ index (__const char *__s, int __c) __THROW ^ user.cpp: In function ‘TreeNode* obtainTree(int, int)’: user.cpp:29:29: error: invalid operands of types ‘<unresolved overloaded function type>’ and ‘std::vector<int>::size_type {aka unsigned int}’ to binary ‘operator>=’ if (index >= preOrder.size()) ^ user.cpp:39:24: error: no match for ‘operator[]’ (operand types are ‘std::vector<int>’ and ‘<unresolved overloaded function type>’) node->value = preOrder[index]; ^ user.cpp:39:24: note: candidates are: In file included from /usr/include/c++/4.8/vector:64:0, from user.cpp:3: /usr/include/c++/4.8/bits/stl_vector.h:770:7: note: std::vector<_Tp, _Alloc>::reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::reference = int&; std::vector<_Tp, _Alloc>::size_type = unsigned int] operator[](size_type __n) ^ /usr/include/c++/4.8/bits/stl_vector.h:770:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::vector<int>::size_type {aka unsigned int}’ /usr/include/c++/4.8/bits/stl_vector.h:785:7: note: std::vector<_Tp, _Alloc>::const_reference std::vector<_Tp, _Alloc>::operator[](std::vector<_Tp, _Alloc>::size_type) const [with _Tp = int; _Alloc = std::allocator<int>; std::vector<_Tp, _Alloc>::const_reference = const int&; std::vector<_Tp, _Alloc>::size_type = unsigned int] operator[](size_type __n) const ^ /usr/include/c++/4.8/bits/stl_vector.h:785:7: note: no known conversion for argument 1 from ‘<unresolved overloaded function type>’ to ‘std::vector<int>::size_type {aka unsigned int}’ user.cpp:44:9: error: no post-increment operator for type index++; ^ user.cpp:49:9: error: no post-increment operator for type index++; ^ user.cpp: In function ‘int main()’: user.cpp:98:12: warning: unused variable ‘root’ [-Wunused-variable] TreeNode *root = obtainTree(0, N - 1); ^