Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:24:2: error: ‘cin’ was not declared in this scope cin >> t; ^ user.cpp:24:2: note: suggested alternative: In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:60:18: note: ‘std::cin’ extern istream cin; /// Linked to standard input ^ user.cpp:29:4: error: ‘cout’ was not declared in this scope cout << suma(n) % 10 << endl ; ^ user.cpp:29:4: note: suggested alternative: In file included from user.cpp:1:0: /usr/include/c++/4.8/iostream:61:18: note: ‘std::cout’ extern ostream cout; /// Linked to standard output ^ user.cpp:29:28: error: ‘endl’ was not declared in this scope cout << suma(n) % 10 << endl ; ^ user.cpp:29:28: note: suggested alternative: In file included from /usr/include/c++/4.8/iostream:39:0, from user.cpp:1: /usr/include/c++/4.8/ostream:564:5: note: ‘std::endl’ endl(basic_ostream<_CharT, _Traits>& __os) ^ user.cpp:22:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen( "cifra.in", "r" , stdin); ^ user.cpp:23:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen ( "cifra.out" , "w", stdout); ^