---

Lỗi biên dịch:

Main.cc: In function ‘int main()’:
Main.cc:17:29: error: ‘num’ was not declared in this scope
   for (int j = 0; j <= cbrt(num); j++)
                             ^~~
Main.cc:17:29: note: suggested alternative: ‘enum’
   for (int j = 0; j <= cbrt(num); j++)
                             ^~~
                             enum