Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:12:5: error: ‘ifstream’ was not declared in this scope ifstream f("euclid2.in"); ^ user.cpp:12:5: 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:12:14: error: expected ‘;’ before ‘f’ ifstream f("euclid2.in"); ^ user.cpp:13:5: error: ‘f’ was not declared in this scope f>>t; ^ user.cpp:14:5: error: ‘ofstream’ was not declared in this scope ofstream g("euclid2.out"); ^ user.cpp:14:5: 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:14:14: error: expected ‘;’ before ‘g’ ofstream g("euclid2.out"); ^ user.cpp:15:10: warning: statement has no effect [-Wunused-value] for(t;t;t--){ ^ user.cpp:17:9: error: ‘g’ was not declared in this scope g<<gcd(a,b)<<"\n"; ^ user.cpp:19:5: error: ‘g’ was not declared in this scope g.close(); ^