Eroare de compilare: user.cpp: In function ‘int main()’: user.cpp:21:10: error: ‘i’ was not declared in this scope for (i=1; i<=n; i++) ^ user.cpp: In function ‘bool eval()’: user.cpp:36:5: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: At global scope: user.cpp:37:5: error: expected unqualified-id before ‘return’ return r; ^ user.cpp:38:1: error: expected declaration before ‘}’ token } ^