Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp:5: warning: ‘typedef’ was ignored in this declaration user.cpp: In function ‘int main()’: user.cpp:20: error: ‘ifstream’ was not declared in this scope user.cpp:20: error: expected ‘;’ before ‘in’ user.cpp:21: error: ‘ofstream’ was not declared in this scope user.cpp:21: error: expected ‘;’ before ‘out’ user.cpp:22: error: ‘in’ was not declared in this scope user.cpp:33: error: ‘qsort’ was not declared in this scope user.cpp:35: error: ‘out’ was not declared in this scope