Eroare de compilare: user.cpp: In function ‘int main(int, char**)’: user.cpp:7:2: error: ‘ifstream’ was not declared in this scope ifstream in("adunare.in"); ^ user.cpp:7:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/iosfwd:157:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:7:11: error: expected ‘;’ before ‘in’ ifstream in("adunare.in"); ^ user.cpp:8:2: error: ‘ofstream’ was not declared in this scope ofstream out("adunare.out"); ^ user.cpp:8:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, from /usr/include/c++/4.8/ostream:38, from /usr/include/c++/4.8/iostream:39, from user.cpp:1: /usr/include/c++/4.8/iosfwd:160:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:8:11: error: expected ‘;’ before ‘out’ ofstream out("adunare.out"); ^ user.cpp:9:2: error: ‘in’ was not declared in this scope in >> A >> B; ^ user.cpp:10:2: error: ‘out’ was not declared in this scope out << A + B; ^