Eroare de compilare: user.cpp:14:6: warning: ISO C++ forbids declaration of ‘main’ with no type [-Wreturn-type] main() ^ user.cpp: In function ‘int main()’: user.cpp:19:2: error: ‘ifstream’ was not declared in this scope ifstream f("cifra.in"); ^ user.cpp:19:2: note: suggested alternative: In file included from /usr/local/include/c++/4.8.0/ios:38:0, from /usr/local/include/c++/4.8.0/ostream:38, from /usr/local/include/c++/4.8.0/iostream:39, from user.cpp:1: /usr/local/include/c++/4.8.0/iosfwd:157:34: note: ‘std::ifstream’ typedef basic_ifstream<char> ifstream; ^ user.cpp:19:11: error: expected ‘;’ before ‘f’ ifstream f("cifra.in"); ^ user.cpp:20:2: error: ‘ofstream’ was not declared in this scope ofstream g("cifra.out"); ^ user.cpp:20:2: note: suggested alternative: In file included from /usr/local/include/c++/4.8.0/ios:38:0, from /usr/local/include/c++/4.8.0/ostream:38, from /usr/local/include/c++/4.8.0/iostream:39, from user.cpp:1: /usr/local/include/c++/4.8.0/iosfwd:160:34: note: ‘std::ofstream’ typedef basic_ofstream<char> ofstream; ^ user.cpp:20:11: error: expected ‘;’ before ‘g’ ofstream g("cifra.out"); ^ user.cpp:21:2: error: ‘f’ was not declared in this scope f>>t1; ^ user.cpp:43:3: error: ‘g’ was not declared in this scope g<<c<<endl; ^ user.cpp:43:9: error: ‘endl’ was not declared in this scope g<<c<<endl; ^ user.cpp:43:9: note: suggested alternative: In file included from /usr/local/include/c++/4.8.0/iostream:39:0, from user.cpp:1: /usr/local/include/c++/4.8.0/ostream:564:5: note: ‘std::endl’ endl(basic_ostream<_CharT, _Traits>& __os) ^ user.cpp:46:2: error: ‘g’ was not declared in this scope g.close(); ^