Borderou de evaluare (job #95346)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:24:5: error: ‘ifstream’ was not declared in this scope user.cpp:24:5: note: suggested alternative: /usr/include/c++/4.6/iosfwd:159:34: note: ‘std::ifstream’ user.cpp:24:14: error: expected ‘;’ before ‘f’ user.cpp:26:5: error: ‘f’ was not declared in this scope user.cpp:29:5: error: ‘ofstream’ was not declared in this scope user.cpp:29:5: note: suggested alternative: /usr/include/c++/4.6/iosfwd:162:34: note: ‘std::ofstream’ user.cpp:29:14: error: expected ‘;’ before ‘o’ user.cpp:39:2: error: ‘o’ was not declared in this scope user.cpp:21:11: warning: unused variable ‘v’ [-Wunused-variable]