Eroare de compilare: user.cpp:6:1: error: ‘ifstream’ does not name a type ifstream fin("permutari.in"); ^ user.cpp:7:1: error: ‘ofstream’ does not name a type ofstream fout("permutari.out"); ^ user.cpp: In function ‘int main()’: user.cpp:12:2: error: ‘fin’ was not declared in this scope fin >> n; ^ user.cpp:13:2: error: ‘vector’ was not declared in this scope vector <int> v(n); ^ user.cpp:13:2: note: suggested alternative: In file included from /usr/include/c++/5/vector:64:0, from /usr/include/c++/5/bits/random.h:34, from /usr/include/c++/5/random:49, from /usr/include/c++/5/bits/stl_algo.h:66, from /usr/include/c++/5/algorithm:62, from user.cpp:3: /usr/include/c++/5/bits/stl_vector.h:214:11: note: ‘std::vector’ class vector : protected _Vector_base<_Tp, _Alloc> ^ user.cpp:13:10: error: expected primary-expression before ‘int’ vector <int> v(n); ^ user.cpp:15:3: error: ‘v’ was not declared in this scope v[i-1] = i; ^ user.cpp:19:4: error: ‘fout’ was not declared in this scope fout << v[i-1] << ' '; ^ user.cpp:19:12: error: ‘v’ was not declared in this scope fout << v[i-1] << ' '; ^ user.cpp:20:3: error: ‘fout’ was not declared in this scope fout << '\n'; ^ user.cpp:21:26: error: ‘v’ was not declared in this scope }while(next_permutation(v.begin(), v.end())); ^ user.cpp:21:44: error: ‘next_permutation’ was not declared in this scope }while(next_permutation(v.begin(), v.end())); ^ user.cpp:21:44: note: suggested alternative: In file included from /usr/include/c++/5/algorithm:62:0, from user.cpp:3: /usr/include/c++/5/bits/stl_algo.h:2988:5: note: ‘std::next_permutation’ next_permutation(_BidirectionalIterator __first, ^