Eroare de compilare: user.cpp:1:9: error: #include expects "FILENAME" or <FILENAME> user.cpp:4: error: ‘ifstream’ does not name a type user.cpp:5: error: ‘ofstream’ does not name a type user.cpp: In function ‘void citeste_graf()’: user.cpp:12: error: ‘f’ was not declared in this scope user.cpp:11: warning: unused variable ‘i’ user.cpp: In function ‘int main()’: user.cpp:41: error: ‘g’ was not declared in this scope user.cpp:47: error: ‘g’ was not declared in this scope user.cpp:31: warning: unused variable ‘x’ user.cpp:31: warning: unused variable ‘y’