Borderou de evaluare (job #439161)

Eroare de compilare: user.cpp:4:13: error: variable ‘std::ifstream fin’ has initializer but incomplete type user.cpp:5:14: error: variable ‘std::ofstream fout’ has initializer but incomplete type user.cpp:6:1: error: expected ‘,’ or ‘;’ before ‘int’ user.cpp: In function ‘int main()’: user.cpp:9:7: error: ‘n’ was not declared in this scope user.cpp:11:1: error: ‘s’ was not declared in this scope user.cpp:12:5: error: ‘i’ was not declared in this scope user.cpp:13:6: error: ‘x’ was not declared in this scope