Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:6:2: error: ‘ifstream’ was not declared in this scope ifstream f("adunare.in"); ^ user.cpp:6:2: 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:6:11: error: expected ‘;’ before ‘f’ ifstream f("adunare.in"); ^ user.cpp:7:2: error: ‘ofstream’ was not declared in this scope ofstream f2("adunare.out"); ^ 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:160:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:7:11: error: expected ‘;’ before ‘f2’ ofstream f2("adunare.out"); ^ user.cpp:9:2: error: ‘f’ was not declared in this scope f>> a >> b; ^ user.cpp:10:2: error: ‘f2’ was not declared in this scope f2 << (a + b); ^