Borderou de evaluare (job #576368)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:24:2: error: ‘ifstream’ was not declared in this scope user.cpp:24:2: note: suggested alternative: /usr/include/c++/4.6/iosfwd:159:34: note: ‘std::ifstream’ user.cpp:24:11: error: expected ‘;’ before ‘cin’ user.cpp:25:2: error: ‘ofstream’ was not declared in this scope user.cpp:25:2: note: suggested alternative: /usr/include/c++/4.6/iosfwd:162:34: note: ‘std::ofstream’ user.cpp:25:11: error: expected ‘;’ before ‘cout’ user.cpp:27:2: error: ‘cin’ was not declared in this scope user.cpp:27:2: note: suggested alternative: /usr/include/c++/4.6/iostream:61:18: note: ‘std::cin’ user.cpp:34:24: error: ‘sort’ was not declared in this scope user.cpp:34:24: note: suggested alternative: /usr/include/c++/4.6/bits/stl_algo.h:5430:5: note: ‘std::sort’ user.cpp:80:13: error: ‘cout’ was not declared in this scope user.cpp:80:13: note: suggested alternative: /usr/include/c++/4.6/iostream:62:18: note: ‘std::cout’ user.cpp:81:9: error: ‘cout’ was not declared in this scope user.cpp:81:9: note: suggested alternative: /usr/include/c++/4.6/iostream:62:18: note: ‘std::cout’ user.cpp:82:2: error: expected ‘}’ at end of input