Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:10:2: error: ‘cin’ was not declared in this scope cin >> a >> b; ^ user.cpp:10:2: note: suggested alternative: In file included from user.cpp:2:0: /usr/include/c++/4.8/iostream:60:18: note: ‘std::cin’ extern istream cin; /// Linked to standard input ^ user.cpp:12:2: error: ‘cout’ was not declared in this scope cout << s; ^ user.cpp:12:2: note: suggested alternative: In file included from user.cpp:2:0: /usr/include/c++/4.8/iostream:61:18: note: ‘std::cout’ extern ostream cout; /// Linked to standard output ^ user.cpp:6:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("adunare.in", "rt", stdin); ^ user.cpp:7:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("adunare.out", "wt", stdout); ^