Eroare de compilare: user.cpp: In function ‘int calc(int)’: user.cpp:20: error: expected ‘;’ before ‘for’ user.cpp:20: error: name lookup of ‘j’ changed for ISO ‘for’ scoping user.cpp:20: note: (if you use ‘-fpermissive’ G++ will accept your code) user.cpp:20: warning: statement has no effect user.cpp:20: error: expected ‘;’ before ‘)’ token user.cpp:24: warning: no return statement in function returning non-void