Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:4:2: error: ‘ifstream’ was not declared in this scope ifstream in("adunare.in"); ^ user.cpp:4:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/iosfwd:157:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:4:11: error: expected ‘;’ before ‘in’ ifstream in("adunare.in"); ^ user.cpp:5:2: error: ‘ofstream’ was not declared in this scope ofstream out("adunare.out"); ^ user.cpp:5:2: note: suggested alternative: In file included from /usr/include/c++/4.8/ios:38:0, from /usr/include/c++/4.8/istream:38, from /usr/include/c++/4.8/fstream:38, from user.cpp:1: /usr/include/c++/4.8/iosfwd:160:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:5:11: error: expected ‘;’ before ‘out’ ofstream out("adunare.out"); ^ user.cpp:8:2: error: ‘in’ was not declared in this scope in >> a >> b; ^ user.cpp:9:2: error: ‘out’ was not declared in this scope out << a + b; ^