Eroare de compilare: user.cpp:1:21: error: iostream.h: No such file or directory user.cpp:3:20: error: fstream.h: No such file or directory user.cpp:6: error: ‘ifstream’ does not name a type user.cpp:7: error: ‘ofstream’ does not name a type user.cpp: In function ‘int main()’: user.cpp:13: error: ‘f’ was not declared in this scope user.cpp:14: warning: comparison between signed and unsigned integer expressions user.cpp:19: warning: comparison between signed and unsigned integer expressions user.cpp:33: error: ‘g’ was not declared in this scope