Borderou de evaluare (job #237720)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:6:5: error: ‘ifstream’ was not declared in this scope user.cpp:6:5: note: suggested alternative: /usr/include/c++/4.6/iosfwd:159:34: note: ‘std::ifstream’ user.cpp:6:14: error: expected ‘;’ before ‘f’ user.cpp:7:5: error: ‘ofstream’ was not declared in this scope user.cpp:7:5: note: suggested alternative: /usr/include/c++/4.6/iosfwd:162:34: note: ‘std::ofstream’ user.cpp:7:14: error: expected ‘;’ before ‘g’ user.cpp:9:5: error: ‘f’ was not declared in this scope user.cpp:110:9: error: ‘g’ was not declared in this scope