Eroare de compilare: user.cpp:1:21: error: fstream.h: No such file or directory user.cpp:3:22: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:20: error: ‘ifstream’ was not declared in this scope user.cpp:20: error: expected ‘;’ before ‘f’ user.cpp:21: error: ‘f’ was not declared in this scope user.cpp:49: error: ‘ofstream’ was not declared in this scope user.cpp:49: error: expected ‘;’ before ‘g’ user.cpp:50: error: ‘g’ was not declared in this scope user.cpp:19: warning: unused variable ‘j’