Eroare de compilare: user.cpp:1:2: error: invalid preprocessing directive #includefstream user.cpp:23:7: warning: no newline at end of file user.cpp:2: error: 'ifstream' does not name a type user.cpp:3: error: 'ofstream' does not name a type user.cpp: In function 'int main()': user.cpp:7: error: 'fn' was not declared in this scope user.cpp:8: warning: suggest parentheses around assignment used as truth value user.cpp:9: error: 'fab' was not declared in this scope user.cpp:11: error: 'ga' was not declared in this scope user.cpp:19: error: 'gan' was not declared in this scope