Eroare de compilare: user.cpp:3:21: error: fstream.h: No such file or directory user.cpp:4:22: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:27: error: ‘ifstream’ was not declared in this scope user.cpp:27: error: expected ‘;’ before ‘in’ user.cpp:28: error: ‘ofstream’ was not declared in this scope user.cpp:28: error: expected ‘;’ before ‘out’ user.cpp:29: error: ‘in’ was not declared in this scope user.cpp:32: error: ‘qsort’ was not declared in this scope user.cpp:34: error: ‘cout’ was not declared in this scope user.cpp:47: error: ‘out’ was not declared in this scope