Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:13:2: error: ‘ifstream’ was not declared in this scope ifstream f("euclid2.in"); ^ user.cpp:13:2: note: suggested alternative: In file included from /usr/include/c++/5/ios:38:0, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/iosfwd:162:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:14:2: error: ‘ofstream’ was not declared in this scope ofstream g("euclid2.out"); ^ user.cpp:14:2: note: suggested alternative: In file included from /usr/include/c++/5/ios:38:0, from /usr/include/c++/5/istream:38, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/iosfwd:165:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:16:2: error: ‘f’ was not declared in this scope f>>T; ^ user.cpp:20:3: error: ‘g’ was not declared in this scope g<<gcd(A,B)<<endl; ^ user.cpp:20:16: error: ‘endl’ was not declared in this scope g<<gcd(A,B)<<endl; ^ user.cpp:20:16: note: suggested alternative: In file included from /usr/include/c++/5/istream:39:0, from /usr/include/c++/5/fstream:38, from user.cpp:1: /usr/include/c++/5/ostream:590:5: note: ‘std::endl’ endl(basic_ostream<_CharT, _Traits>& __os) ^