Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:9:2: error: ‘cin’ was not declared in this scope cin>>n; ^ user.cpp:21:2: error: ‘cout’ was not declared in this scope cout<<setprecision(6)<<fixed; ^ user.cpp:21:22: error: ‘setprecision’ was not declared in this scope cout<<setprecision(6)<<fixed; ^ user.cpp:7:32: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aria.in", "r", stdin); ^ user.cpp:8:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("aria.out", "w", stdout); ^