Eroare de compilare: user.cpp:2:20: error: fstream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:17: error: ‘ifstream’ was not declared in this scope user.cpp:17: error: expected ‘;’ before ‘f’ user.cpp:18: error: ‘ofstream’ was not declared in this scope user.cpp:18: error: expected ‘;’ before ‘g’ user.cpp:19: error: ‘f’ was not declared in this scope user.cpp:22: error: ‘qsort’ was not declared in this scope user.cpp:24: error: ‘g’ was not declared in this scope