Eroare de compilare: main.cpp: In function 'int main()': main.cpp:9:2: error: 'ifstream' was not declared in this scope ifstream in("adunare.in"); ^~~~~~~~ main.cpp:9:2: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:5: /usr/include/c++/6/iosfwd:162:34: note: 'std::ifstream' typedef basic_ifstream<char> ifstream; ^~~~~~~~ main.cpp:10:2: error: 'ofstream' was not declared in this scope ofstream out("adunare.out"); ^~~~~~~~ main.cpp:10:2: note: suggested alternative: In file included from /usr/include/c++/6/ios:38:0, from /usr/include/c++/6/istream:38, from /usr/include/c++/6/fstream:38, from main.cpp:5: /usr/include/c++/6/iosfwd:165:34: note: 'std::ofstream' typedef basic_ofstream<char> ofstream; ^~~~~~~~ main.cpp:12:2: error: 'cin' was not declared in this scope cin >> a >> b; ^~~ main.cpp:13:2: error: 'cout' was not declared in this scope cout << a + b; ^~~~ Non zero exit status: 1