Borderou de evaluare (job #2382)

Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:7:2: error: ‘ifstream’ was not declared in this scope user.cpp:7:2: note: suggested alternative: /usr/include/c++/4.6/iosfwd:159:34: note: ‘std::ifstream’ user.cpp:7:11: error: expected ‘;’ before ‘f’ user.cpp:9:2: error: ‘f’ was not declared in this scope user.cpp:8:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result]