Eroare de compilare: user.cpp:2:21: error: fstream.h: No such file or directory user.cpp: In function ‘void citire()’: user.cpp:8: error: ‘ifstream’ was not declared in this scope user.cpp:8: error: expected ‘;’ before ‘fin’ user.cpp:9: error: ‘fin’ was not declared in this scope user.cpp: In function ‘int main()’: user.cpp:51: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result