Eroare de compilare: main.cpp: In function 'int main()': main.cpp:13:5: error: 'ifstream' was not declared in this scope ifstream f ("euclid2.in"); ^~~~~~~~ main.cpp:13:5: 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:1: /usr/include/c++/6/iosfwd:162:34: note: 'std::ifstream' typedef basic_ifstream<char> ifstream; ^~~~~~~~ main.cpp:14:5: error: 'ofstream' was not declared in this scope ofstream g ("euclid2.out"); ^~~~~~~~ main.cpp:14:5: 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:1: /usr/include/c++/6/iosfwd:165:34: note: 'std::ofstream' typedef basic_ofstream<char> ofstream; ^~~~~~~~ main.cpp:17:5: error: 'f' was not declared in this scope f>>T; ^ main.cpp:20:15: error: 'b' was not declared in this scope f>>A>>b; ^ main.cpp:21:9: error: 'g' was not declared in this scope g<< gcd(A, B)<<'\n'; ^ Non zero exit status: 1