Eroare de compilare: user.cpp:1:20: error: fstream.h: No such file or directory user.cpp:2:21: error: iostream.h: No such file or directory user.cpp: In function ‘int main()’: user.cpp:9: error: ‘fstream’ was not declared in this scope user.cpp:9: error: expected ‘;’ before ‘f’ user.cpp:10: error: ‘f’ was not declared in this scope user.cpp:11: error: ‘labs’ was not declared in this scope user.cpp:26: error: ‘g’ was not declared in this scope user.cpp:33: error: ‘g’ was not declared in this scope